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Intel Core i7 1255U Review | 78 Data compared

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  • Avg. price in UK: ~£380
  • Avg. price in US: ~$430
  • PassMark benchmark result: 12949
  • N. of physical cores: 10
  • CPU boost clock speed: 4.7 GHz

Intel Core i7 1255U review. Compare 78 technical specifications and user reviews to see how it ranks among processors and if it is worth buying.

5.9

Overall score

What it is: An overall evaluation of the processor's quality, based on technical analyses and user reviews.

When it matters: When you need a quick reference to identify the best processors on the market.

Score components:

90.0%

5.9

Technical Score

10.0%

?

User score

Good
5.9

Technical Score

What it is: An assessment of the processor's technical performance, covering key areas such as processing performance, core configuration, efficiency, platform support, integrated features, and thermal behavior.

When it matters: When you want to compare processors based on technical performance and available features.

Score components:

60.0%

4.9

Performance

18.0%

7.3

Cache & Architecture

10.0%

6.9

Memory & PCIe

7.0%

7.3

Power & Thermal

4.0%

7.8

Platform

1.0%

8.7

Integrated Graphics

Good
?

User score

What it is: A rating that combines user reviews and the total number of reviews received by the processor.

When it matters: When you want to know how a processor performs in real workloads and how reliable it is for gaming, productivity, and efficiency according to user feedback.

Score components:

70.0%

?

User reviews

30.0%

?

Popularity

  • 5.5
    Gaming

    Score components:

    30.0%

    5.7

    PassMark single-core benchmark score

    25.0%

    6.5

    Geekbench 6 single-core benchmark score

    20.0%

    6.7

    CPU boost clock speed

    17.0%

    2.7

    L3 cache

    8.0%

    4.3

    N. of physical cores

  • 3.8
    Video editing

    Score components:

    45.0%

    4.0

    Geekbench 6 multi-core benchmark score

    20.0%

    4.3

    N. of physical cores

    20.0%

    4.0

    CPU threads

    15.0%

    2.7

    L3 cache

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Best prices in UK

    N/A~ £380

Best rankings

?

Available: ranking among products currently available (including other versions of this product).
All: ranking among all products in the database.

Verdict

The Intel Core i7-1255U is a 12th-generation Alder Lake-U series mobile processor featuring a hybrid architecture with 10 total cores (2 Performance-cores and 8 Efficient-cores) and 12 threads. It operates with a base frequency of 1.7 GHz and can reach a Max Turbo frequency of 4.7 GHz, supported by 12 MB of Intel Smart Cache. Key advantages include its high power efficiency with a 15W base TDP (scalable up to 55W Turbo Power), integrated Intel Iris Xe Graphics with 96 execution units, and support for modern memory types like DDR5-4800 and LPDDR5-5200. However, its low core count of only two high-performance cores can limit sustained multi-threaded performance compared to P-series or H-series models, and it may experience thermal throttling in extremely thin laptop designs during intensive workloads.

Technical Specifications of processor Intel Core i7 1255U

Technical Score

What it is: An assessment of the processor's technical performance, covering key areas such as processing performance, core configuration, efficiency, platform support, integrated features, and thermal behavior.

When it matters: When you want to compare processors based on technical performance and available features.

Score components:

60.0%

?

Performance

18.0%

?

Cache & Architecture

10.0%

?

Memory & PCIe

7.0%

?

Power & Thermal

4.0%

?

Platform

1.0%

?

Integrated Graphics

5.9
Intel Core i7 1255U has a technical score of 5.87 points, which is higher than that of 62.1% of products in this category.
User score

What it is: A rating that combines user reviews and the total number of reviews received by the processor.

When it matters: When you want to know how a processor performs in real workloads and how reliable it is for gaming, productivity, and efficiency according to user feedback.

Score components:

70.0%

0.0

User reviews

30.0%

1.0

Popularity

?
Popularity
What it is: An indicator based on the number of reviews received by the processor.
When it matters: When you prefer to choose a processor reviewed and selected by many other buyers.
1.0
Intel Core i7 1255U has a popularity of 1 points, which is higher than 0% of products in this category.
Ratio quality/price

What it is: An indicator that combines the processor's overall rating with its cost.

When it matters: When you are looking for a processor with a good balance between performance, efficiency, and price.

Score components:

60.0%

5.9

Overall score

40.0%

8.5

Price

6.7
Intel Core i7 1255U has a quality-to-price ratio of 6.7 points, which is higher than 61.9% of products in this category.
Brand name
What it is: The manufacturer or brand of the product.
When it matters: When you prefer a specific ecosystem, support network, or design philosophy.

Importance: MEDIUM

Intel
Processor type
What it is: The kind of system the processor is built for, such as desktop PCs, laptops, workstations, or servers.
When it matters: When you want a processor meant for the kind of machine you are actually building or buying, rather than a chip aimed at a different class of system.

Importance: HIGH

mobile
Intel Core i7 1255U belongs to the mobile processor class, which is more advanced than that of 7.3% of processors and equal to that of 48.6% of processors.
CPU socket
What it is: The physical socket the processor fits into on the motherboard.
When it matters: When you need to make sure the CPU can actually be installed on a specific motherboard.

Importance: HIGH

FCBGA1744
Intel Core i7 1255U uses the FCBGA1744 CPU socket, which is older than that of 71% of processors and equal to that of 5.1% of processors.
Chipset
What it is: The motherboard chipset families officially meant to work with the processor.
When it matters: When you are checking whether a CPU will work with the motherboard features and platform you plan to use.

Importance: HIGH

N/A
CPU architecture
What it is: The processor family or design generation behind the chip, such as Zen 4 or Raptor Lake.
When it matters: When you are comparing CPUs across generations and want a clearer sense of their design age, feature level, and expected performance class.

Importance: HIGH

x86-64
Intel Core i7 1255U uses the x86-64 architecture, which is more advanced than that of 1.7% of processors and equal to that of 98.3% of processors.
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N. of physical cores
What it is: The number of physical CPU cores on the processor.
When it matters: When you run workloads that benefit from more real cores.

Importance: HIGH

Good value: 8+

10
Intel Core i7 1255U has 10 CPU cores, which is more than 77.1% of processors and equal to 4.3% of processors.
CPU threads
What it is: The total number of processing threads the CPU can handle at once.
When it matters: When you run heavily threaded workloads or multitask a lot.

Importance: HIGH

Good value: 16+

12
Intel Core i7 1255U offers 12 CPU threads, which is more than 55.1% of processors and equal to 14.1% of processors.
Threads per core
What it is: The number of threads each physical core can handle at once.
When it matters: When you want to understand how much thread-level parallelism each core can provide in multitasking or heavily threaded work.

Importance: MEDIUM

Good value: 2

?
CPU boost clock speed
What it is: The highest clock speed the processor can reach under boost conditions.
When it matters: When you care about peak speed in short bursts.

Importance: HIGH

Good value: >4.7 GHz

4.7 GHz
Intel Core i7 1255U reaches a boost clock of 4.7 GHz which is higher than that of 67.1% of processors and equal to that of 3.7% of processors.
CPU base clock speed
What it is: The processor's normal all-core starting frequency before boost behavior raises clocks temporarily.
When it matters: When you care about steadier performance in longer workloads rather than short burst speed alone.

Importance: MEDIUM

2 x 1.7 GHz & 8 x 1.2 GHz
Intel Core i7 1255U has a base clock of 2x1.7 GHz & 8x1.2 GHz which is equal to that of 100% of processors.
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Semiconductor size
What it is: The manufacturing process node used to produce the processor, usually expressed in nanometers.
When it matters: When efficiency, heat, and the relative modernity of the chip-making process matter to your comparison.

Importance: HIGH

Good value: <10 nm

10 nm
Intel Core i7 1255U uses a 10 nm process node, which is more advanced than that of 52.3% of processors and equal to that of 19.1% of processors.
Foundry
What it is: The semiconductor manufacturer that physically fabricates the processor chip.
When it matters: When process source, manufacturing generation, or foundry differences matter to your comparison more than day-to-day performance alone.

Importance: MEDIUM

Intel 7
Intel Core i7 1255U is built on the Intel 7 foundry process, which is more advanced than that of 66.2% of processors and equal to that of 14.9% of processors.
L3 cache
What it is: The total amount of L3 cache available on the processor.
When it matters: When you want better performance in cache-sensitive workloads and games.

Importance: MEDIUM

Good value: >=16 MB

12 MB
Intel Core i7 1255U has an L3 cache of 12 MB which is larger than that of 54.4% of processors and equal to that of 9% of processors.
L2 cache
What it is: The total amount of L2 cache available across the processor.
When it matters: When you want to compare CPU design efficiency and how much fast intermediate cache the cores have available.

Importance: MEDIUM

Good value: >=6 MB

6.5 MB
Intel Core i7 1255U has an L2 cache of 6.5 MB which is larger than that of 71.1% of processors and equal to that of 1.2% of processors.
L1 cache
What it is: The total amount of L1 cache built into the processor, which sits closest to the cores.
When it matters: When you are comparing low-level CPU design details rather than the broader performance picture buyers usually notice first.

Importance: MEDIUM

Good value: >=512 KB

928 KB
Intel Core i7 1255U has an L1 cache of 928 KB which is larger than that of 83.5% of processors and equal to that of 1.7% of processors.
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DDR memory version
What it is: The RAM generation the processor is designed to support, such as DDR4 or DDR5.
When it matters: When you need the CPU to match the kind of memory platform you want to buy or reuse.

Importance: MEDIUM

Good value: DDR5

DDR4/DDR5/LPDDR4X/LPDDR5
Intel Core i7 1255U supports DDR DDR4/DDR5/LPDDR4X/LPDDR5, which is newer than that of 95.7% of processors and equal to that of 1.5% of processors.
Maximum memory speed
What it is: The highest official memory speed supported by the processor.
When it matters: When you choose RAM and want to know the supported speed ceiling.

Importance: HIGH

Good value: >=4800 MHz

5,200 MHz
Intel Core i7 1255U supports memory speeds up to 5200 MHz, which is higher than that of 72.1% of processors and equal to 7% of processors.
Max memory speed (JEDEC)
What it is: The highest official RAM speed the processor supports under standard JEDEC settings, before any memory overclocking profiles are applied.
When it matters: When officially supported stock RAM speed matters more than XMP, EXPO, or manual memory tuning.

Importance: MEDIUM

Good value: >=5600 MHz

LPDDR5-5200 MHz
Intel Core i7 1255U supports JEDEC memory speeds up to LPDDR5-5200 MHz, which is higher than that of 72.2% of processors and equal to 1.8% of processors.
Max memory speed (XMP / EXPO)
What it is: The highest memory speed supported through XMP or EXPO profiles.
When it matters: When you want faster RAM through memory profiles.

Importance: MEDIUM

Good value: >=5200 MHz

N/A
Maximum memory capacity
What it is: The largest total amount of memory officially supported by the processor.
When it matters: When you plan a system with very large RAM capacity.

Importance: HIGH

Good value: >=128 GB

64 GB
Intel Core i7 1255U supports up to 64 GB of memory, which is more than 28.4% of processors and equal to 27.6% of processors.
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Integrated graphics
What it is: Includes built-in graphics, so the system can output video without a separate graphics card.
When it matters: When you want the PC to work without a dedicated GPU, or you are building an office, media, compact, or troubleshooting-friendly system.

Importance: HIGH

yes
Intel Core i7 1255U includes integrated graphics. 87.6% of processors include integrated graphics.
Integrated GPU model
What it is: The model name of the integrated graphics processor, if present.
When it matters: When you plan to use the CPU's built-in graphics.

Importance: MEDIUM

Intel Iris Xe Graphics 96EU
Intel Core i7 1255U uses the Intel Iris Xe Graphics 96EU integrated GPU, which is more advanced than that in 81.1% of processors and equal to that in 2.9% of processors.
Integrated GPU execution units
What it is: The number of execution units available in the integrated graphics part of the processor.
When it matters: When you plan to rely on built-in graphics and want a better sense of its light gaming, display, or media capability.

Importance: MEDIUM

Good value: >=24

96
Intel Core i7 1255U has 96 GPU execution units, which is more than 95.1% of processors and equal to 4% of processors.
Integrated GPU base frequency
What it is: The base operating frequency of the integrated GPU.
When it matters: When integrated graphics performance matters to you.

Importance: MEDIUM

Good value: >=350 MHz

300 MHz
Intel Core i7 1255U has an integrated GPU clock of 300 MHz which is lower than that of 57% of processors and equal to that of 38.7% of processors.
Integrated media encoders/decoders
What it is: The hardware media formats the processor can encode or decode directly.
When it matters: When you stream, edit video, or rely on hardware media acceleration.

Importance: LOW

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TDP (Thermal design power)
What it is: The rated thermal design power, which gives a general idea of cooling and power needs.
When it matters: When you choose a cooler or build in a tighter case.

Importance: HIGH

Good value: <30 W

15 W
Intel Core i7 1255U has a TDP of 15 W which is lower than that of 77.7% of processors and equal to that of 16.1% of processors.
Base power (PL1)
What it is: The sustained power target used for longer CPU loads.
When it matters: When you choose cooling and power delivery for sustained workloads.

Importance: MEDIUM

Good value: <30 W

15 W
Intel Core i7 1255U has a base power of 15 W which is lower than that of 77.2% of processors and equal to that of 16.2% of processors.
Boost power (PL2)
What it is: The short-term boost power limit the processor may draw under heavier turbo loads.
When it matters: When you size cooling and power delivery for peak turbo behavior.

Importance: MEDIUM

Good value: <50 W

55 W
Intel Core i7 1255U has a boost power of 55 W which is lower than that of 57.3% of processors and equal to that of 4.6% of processors.
Tau (power duration limit)
What it is: The time limit the CPU can stay at higher boost power before dropping toward sustained power.
When it matters: When you want to understand turbo behavior under longer loads.

Importance: MEDIUM

Good value: <=28 s

28 seconds
Intel Core i7 1255U has a turbo duration of 28 seconds which is longer than that of 3.8% of processors and equal to that of 85% of processors.
Configurable TDP
What it is: Allows the processor to run in alternate power modes instead of being fixed to one default TDP target.
When it matters: When you want more control over heat, noise, and power draw in compact systems, quieter builds, or thermally limited machines.

Importance: LOW

yes
Intel Core i7 1255U supports configurable TDP. 52.9% of processors support configurable TDP.
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Intel Core i7 1255U vs the average processor

  • Newer DDR support
    Intel Core i7 1255U supports a newer DDR generation than the average processor (DDR4/DDR5/LPDDR4X/LPDDR5 vs DDR4).
    What it is: The RAM generation the processor is designed to support, such as DDR4 or DDR5.
    When it matters: When you need the CPU to match the kind of memory platform you want to buy or reuse.

    Importance: MEDIUM

    Good value: DDR5

    Intel Core i7 1255U supports a newer DDR generation than the average processor (DDR4/DDR5/LPDDR4X/LPDDR5 vs DDR4).DDR4/DDR5/LPDDR4X/LPDDR5 vs DDR4
  • 52.8% higher single-core score
    Intel Core i7 1255U has a higher Geekbench 6 single-core score than the average processor (2,248 vs 1,471). The average processor scores 1,471 in Geekbench 6 single-core.
    What it is: A Geekbench 6 score that reflects single-core CPU performance in mixed modern workloads.
    When it matters: When you care about snappy everyday performance in lighter apps, browsing, office work, or tasks that do not scale well across many cores.

    Importance: HIGH

    Good value: >2000

    Intel Core i7 1255U has a higher Geekbench 6 single-core score than the average processor (2,248 vs 1,471). The average processor scores 1,471 in Geekbench 6 single-core.2,248 vs 1,471
  • 2.5x more L2 per core
    Intel Core i7 1255U has more L2 cache per core than the average processor (1.3 MB/core vs 0.5 MB/core). The average processor provides 0.5 MB/core of L2 cache per core.
    E-core cluster: 0.5 MB shared
    What it is: The amount of L2 cache available to each CPU core.
    When it matters: When you are comparing per-core cache resources in deeper architectural analysis.

    Importance: LOW

    Good value: >=1 MB/core

    Intel Core i7 1255U has more L2 cache per core than the average processor (1.3 MB/core vs 0.5 MB/core). The average processor provides 0.5 MB/core of L2 cache per core.1.25 MB/core vs 0.5 MB/core
  • 4 more CPU cores
    Intel Core i7 1255U has more CPU cores than the average processor (10 vs 6). The average processor has 6 CPU cores.
    What it is: The number of physical CPU cores on the processor.
    When it matters: When you run workloads that benefit from more real cores.

    Importance: HIGH

    Good value: 8+

    Intel Core i7 1255U has more CPU cores than the average processor (10 vs 6). The average processor has 6 CPU cores.10 vs 6
  • Uses big.LITTLE design
    Intel Core i7 1255U uses a big.LITTLE design, the average processor does not.
    What it is: Combines high-performance cores with lower-power efficiency cores instead of relying on just one core type.
    When it matters: When you want strong burst performance in demanding tasks without wasting as much power during lighter background work.

    Importance: MEDIUM

    Intel Core i7 1255U uses a big.LITTLE design, the average processor does not.
  • 34.1% higher Cinebench R20 single-core score
    Intel Core i7 1255U has a higher Cinebench R20 single-core score than the average processor (649 vs 484). The average processor scores 484 in Cinebench R20 single-core.
    What it is: A Cinebench R20 benchmark score that reflects single-core CPU performance.
    When it matters: When you care about lighter workloads, interface responsiveness, or software that still depends heavily on one fast core.

    Importance: HIGH

    Good value: >600

    Intel Core i7 1255U has a higher Cinebench R20 single-core score than the average processor (649 vs 484). The average processor scores 484 in Cinebench R20 single-core.649 vs 484
  • Newer PCIe version
    Intel Core i7 1255U supports a newer PCIe version than the average processor (4 vs 3.0).
    What it is: The newest PCIe generation the processor can use directly for graphics cards, SSDs, and other high-speed expansion devices.
    When it matters: When you want support for newer GPUs or SSDs, or more bandwidth for high-speed expansion hardware.

    Importance: HIGH

    Good value: 4.0

    Intel Core i7 1255U supports a newer PCIe version than the average processor (4 vs 3.0).4.0 vs 3.0
  • 66.7% lower base power
    Intel Core i7 1255U has a lower base power draw than the average processor (15 W vs 45 W). The average processor has a base power draw of 45 W.
    What it is: The sustained power target used for longer CPU loads.
    When it matters: When you choose cooling and power delivery for sustained workloads.

    Importance: MEDIUM

    Good value: <30 W

    Intel Core i7 1255U has a lower base power draw than the average processor (15 W vs 45 W). The average processor has a base power draw of 45 W.15 W vs 45 W
  • Supports HMP
    Intel Core i7 1255U supports HMP, the average processor does not.
  • 52.8% higher single-core score
    Intel Core i7 1255U has a higher Geekbench 6 single-core score than the average processor (2,248 vs 1,471). The average processor scores 1,471 in Geekbench 6 single-core.
  • 4 more CPU cores
    Intel Core i7 1255U has more CPU cores than the average processor (10 vs 6). The average processor has 6 CPU cores.
  • 34.1% higher Cinebench R20 single-core score
    Intel Core i7 1255U has a higher Cinebench R20 single-core score than the average processor (649 vs 484). The average processor scores 484 in Cinebench R20 single-core.
  • 26.9% better single-core performance
    Intel Core i7 1255U has a higher PassMark single-core score than the average processor (3,150 vs 2,483). The average processor scores 2,483 in PassMark single-core.
  • 9.3% higher boost clock
    Intel Core i7 1255U has a higher boost clock speed than the average processor (4.7 GHz vs 4.3 GHz). The average processor reaches boost clock speed of 4.3 GHz.
  • 65.1% higher multi-core score
    Intel Core i7 1255U has a higher Geekbench 6 multi-core score than the average processor (7,914 vs 4,793). The average processor scores 4,793 in Geekbench 6 multi-core.
  • 4 more CPU threads
    Intel Core i7 1255U has more CPU threads than the average processor (12 vs 8). The average processor has 8 CPU threads.
  • 2.5x more L2 per core
    Intel Core i7 1255U has more L2 cache per core than the average processor (1.3 MB/core vs 0.5 MB/core). The average processor provides 0.5 MB/core of L2 cache per core.
  • Uses big.LITTLE design
    Intel Core i7 1255U uses a big.LITTLE design, the average processor does not.
  • More advanced microarchitecture
    Intel Core i7 1255U uses a more advanced microarchitecture than the average processor (Alder Lake vs Kaby Lake).
  • 2.42x larger L1 cache
    Intel Core i7 1255U has a higher L1 cache than the average processor (928 KB vs 384 KB). The average processor has L1 cache of 384 KB.
  • 2.6x larger L2 cache
    Intel Core i7 1255U has a higher L2 cache than the average processor (6.5 MB vs 2.5 MB). The average processor has L2 cache of 2.5 MB.
  • More advanced foundry
    Intel Core i7 1255U uses a more advanced foundry process than the average processor (Intel 7 vs Intel 14 nm).
  • 50% larger L3 cache
    Intel Core i7 1255U has a higher L3 cache than the average processor (12 MB vs 8 MB). The average processor has L3 cache of 8 MB.
  • 16.7% smaller process node
    Intel Core i7 1255U has a lower process node than the average processor (10 nm vs 12 nm). The average processor uses a process node of 12 nm.
  • Newer DDR support
    Intel Core i7 1255U supports a newer DDR generation than the average processor (DDR4/DDR5/LPDDR4X/LPDDR5 vs DDR4).
  • Newer PCIe version
    Intel Core i7 1255U supports a newer PCIe version than the average processor (4 vs 3.0).
  • 4 more PCIe lanes
    Intel Core i7 1255U has more PCIe lanes than the average processor (20 vs 16). The average processor offers 16 PCIe lanes.
  • 77.3% higher memory speed
    Intel Core i7 1255U has a higher maximum memory speed than the average processor (5,200 MHz vs 2,933 MHz). The average processor supports memory speed of 2,933 MHz.
  • 4x more GPU execution units
    Intel Core i7 1255U has more GPU execution units than the average processor (96 vs 24). The average processor has 24 GPU execution units.
  • Better integrated GPU
    Intel Core i7 1255U uses a better integrated GPU than the average processor (Intel Iris Xe Graphics 96EU vs Intel UHD Graphics 630).
  • 1 more supported displays
    Intel Core i7 1255U has more supported displays than the average processor (4 vs 3). The average processor supports 3 displays.
  • 66.7% lower base power
    Intel Core i7 1255U has a lower base power draw than the average processor (15 W vs 45 W). The average processor has a base power draw of 45 W.
  • 66.7% lower TDP
    Intel Core i7 1255U has a lower TDP than the average processor (15 W vs 45 W). The average processor has a TDP of 45 W.

Total
Platform
Performance
Cache & Architecture
Memory & PCIe
Integrated Graphics
Power & Thermal
  • Narrower instruction support
    Intel Core i7 1255U supports a narrower instruction set than the average processor (MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX2, FMA3, AES, SHA vs MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, F16C, FMA3, AES, SHA).
  • Older CPU socket
    Intel Core i7 1255U uses an older CPU socket than the average processor (FCBGA1,744 vs FP2).
  • 11 lower clock multiplier
    Intel Core i7 1255U has a lower clock multiplier than the average processor (17 vs 28). The average processor has a clock multiplier of 28.
  • 30% less L3 per core
    Intel Core i7 1255U has less L3 cache per core than the average processor (1.2 MB/core vs 1.714 MB/core). The average processor provides 1.714 MB/core of L3 cache per core.
  • 30% less L3 per core
    Intel Core i7 1255U has less L3 cache per core than the average processor (1.2 MB/core vs 1.714 MB/core). The average processor provides 1.714 MB/core of L3 cache per core.
    What it is: The amount of L3 cache effectively available per CPU core.
    When it matters: When you are comparing how much shared cache each core can draw on in deeper technical analysis.

    Importance: MEDIUM

    Good value: >=2 MB/core

    Intel Core i7 1255U has less L3 cache per core than the average processor (1.2 MB/core vs 1.714 MB/core). The average processor provides 1.714 MB/core of L3 cache per core.1.2 MB/core vs 1.714 MB/core
  • Narrower instruction support
    Intel Core i7 1255U supports a narrower instruction set than the average processor (MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX2, FMA3, AES, SHA vs MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, F16C, FMA3, AES, SHA).
    What it is: The supported CPU instruction sets and extensions.
    When it matters: When you run software that depends on specific CPU instructions.

    Importance: MEDIUM

    Intel Core i7 1255U supports a narrower instruction set than the average processor (MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX2, FMA3, AES, SHA vs MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, F16C, FMA3, AES, SHA).MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX2, FMA3, AES, SHA vs MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, F16C, FMA3, AES, SHA
  • 52% more expensive
    Intel Core i7 1255U is more expensive than the average processor (£380 vs £250).
    Intel Core i7 1255U is more expensive than the average processor (£380 vs £250).£380 vs £250
  • 11 lower clock multiplier
    Intel Core i7 1255U has a lower clock multiplier than the average processor (17 vs 28). The average processor has a clock multiplier of 28.
    What it is: The ratio used to derive CPU frequency from the base clock.
    When it matters: When you tune or compare overclocking behavior.

    Importance: LOW

    Good value: >33

    Intel Core i7 1255U has a lower clock multiplier than the average processor (17 vs 28). The average processor has a clock multiplier of 28.17 vs 28
  • Older CPU socket
    Intel Core i7 1255U uses an older CPU socket than the average processor (FCBGA1,744 vs FP2).
    What it is: The physical socket the processor fits into on the motherboard.
    When it matters: When you need to make sure the CPU can actually be installed on a specific motherboard.

    Importance: HIGH

    Intel Core i7 1255U uses an older CPU socket than the average processor (FCBGA1,744 vs FP2).FCBGA1744 vs FP2
Total
Overall
Platform
Performance
Cache & Architecture

Graphic comparison of Intel Core i7 1255U and other processors

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Third-party reviews

What customers like about Intel Core i7 1255U?

  • Excellent power efficiency for standard office tasks and web browsing
  • Strong single-core performance, making it quick for photo editing and light creative work
  • Capable integrated Iris Xe graphics (96EU) for light 2D/3D animation and casual gaming
  • Good value for ultraportable laptops, offering 10 cores in a 15W TDP envelope
  • Noticeable multi-threaded performance boost over previous 11th Gen U-series chips

What customers dislike about Intel Core i7 1255U?

  • Prone to thermal throttling in thin-and-light laptop chassis during heavy tasks
  • Performance is highly dependent on the specific laptop's cooling and power limits
  • Negligible performance difference compared to the cheaper i5-1235U in many real-world scenarios
  • Struggles with intensive 3D rendering or professional video editing without a discrete GPU
  • Can run hot in tablet or 2-in-1 form factors, making it uncomfortable for handheld use

Expert reviews

S
score.nero.com
27/05/2026
12th Gen Intel Core i7-1255U Benchmarks - Nero Score

The 12th Gen Intel Core i7-1255U is a versatile, 10-core mobile processor designed for thin-and-light laptops, achieving a high score of 1,496 in Nero benchmarks. It features excellent single-core speeds up to 4.7 GHz and strong integrated Iris Xe G7 graphics for productivity and media, though it can suffer from thermal throttling under sustained heavy workloads. The chip, which...Read more

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openbenchmarking.org
Q3 2022
Intel Core I7-1255U Benchmarks, Linux Performance

The Intel Core i7-1255U is a 10-core (2 E), 12-thread Alder Lake-U processor designed for thin-and-light laptops, featuring a 1.7 GHz base clock, 4.7 GHz boost, and integrated Iris Xe graphics. It offers strong single-threaded performance and efficiency for Linux-based workloads, supporting modern instruction sets like AVX2. While suitable for office tasks and light coding, the chip...Read more

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cpubenchmark.net
Daily Updates
Intel Core i7-1255U - CPU Benchmarks

The Intel Core i7-1255U, detailed on PassMark Software CPU Benchmarks, is a 12th-generation Alder Lake laptop processor featuring a hybrid architecture with 10 cores (2 Performance, 8 Efficient) and 12 threads, designed for thin-and-light laptops. It features a 12 MB L3 cache, a base 15W TDP (scalable to 55W), and integrated Intel Iris Xe Graphics. Key pros include the hybrid...Read more

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laptopmedia.com
09/11/2022
[Comparison] Intel Core i7-1250U vs Intel Core i7-1255U – does the extra wattage matter?

According to LaptopMedia, the Intel Core i7-1255U (15W) holds a clear advantage over the i7-1250U (9W) in both processing and graphics, scoring roughly 12% higher in Cinebench 20 and 21–23% higher in 3DMark/Unigine tests. While the 15W chip offers superior performance for creative tasks and gaming, its capabilities are highly reliant on the laptop's specific cooling solution....Read more

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laptopmedia.com
18/07/2022
[Comparison] Intel Core i7-1255U vs Intel Core i7-11800H – how far can the new architecture go?

The LaptopMedia comparison between the 15W Intel Core i7-1255U (Alder Lake) and the 45W Core i7-11800H (Tiger Lake) highlights a significant shift in architecture and efficiency, with the ULV processor performing well beyond its power envelope. While the i7-11800H dominates in 3D rendering—outperforming the i7-1255U by approximately 55% with 8 full-performance cores and a 24MB L3...Read more

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laptopmedia.com
30/03/2026
Intel Core i7-1255U - LaptopMedia Benchmarks

The Intel Core i7-1255U is a 10-core (2 E), 12-thread Alder Lake-U processor designed for thin and light laptops, offering strong single-core performance suitable for daily responsiveness and a capable Iris Xe GPU. While efficient, the processor's performance is heavily influenced by the specific laptop's cooling solution, leading to a potential 20% variance and performance...Read more

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laptopmedia.com
09/11/2022
[Comparison] Intel Core i7-1250U vs Intel Core i7-1255U – does the extra wattage matter?

The Intel Core i7-1250U and i7-1255U are both 10-core, 12-thread processors, with the 9W i7-1250U serving as a "stable" option for ultra-thin devices, offering a pro of consistent performance while facing a con of lower peak power. Conversely, the 15W i7-1255U provides higher performance, holding a 12% advantage in Cinebench 20 and up to 23% in graphic tasks, though it requires...Read more

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laptopmedia.com
18/07/2022
[Comparison] Intel Core i7-1255U vs Intel Core i7-11800H – How far can the new architecture go?

LaptopMedia compares the 15W Intel Core i7-1255U (Alder Lake) and the 45W Core i7-11800H (Tiger Lake), highlighting a shift from raw performance to high-efficiency, hybrid architecture in mobile computing. While the 11800H dominates in 3D rendering with a 55% advantage due to its higher power limit and core count, the i7-1255U wins in 2D Adobe Photoshop benchmarks, proving superior...Read more

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laptopmedia.com
13/07/2022
[Comparison] Intel Core i7-1255U vs Intel Core i7-1195G7: Is this the best ULV CPU Intel has ever made?

According to a LaptopMedia comparison, the Alder Lake Intel Core i7-1255U outperforms the older Tiger Lake i7-1195G7, offering higher efficiency and a 10-core (2 E) design against the 4-core i7-1195G7. The i7-1255U’s primary pros include a 25% performance advantage in benchmarks and better RAM support, while the i7-1195G7's main con is severe thermal throttling that limits its...Read more

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laptopmedia.com
09/11/2022
Intel Core i7-1250U vs. Intel Core i7-1255U Comparison

The Intel Core i7-1250U (9W) and i7-1255U (15W) are 10-core, 12-thread processors where the former offers superior stability for ultra-thin devices, while the latter, a standard U-series chip, provides higher performance. A key advantage of the i7-1250U is reduced thermal pressure, although it is slower and restricted to niche business laptops. Conversely, the i7-1255U delivers...Read more

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computerbase.de
21/09/2022
Core i-1200P/U vs. Ryzen 6000HS/U Review

This ComputerBase review evaluates Intel's 12th Gen Alder Lake P/U-series against AMD’s Ryzen 6000 series, with Intel's 28W P-series emerging as the direct competitor to AMD's 15–28W U-series. Intel processors deliver massive, hybrid-driven performance gains with superior single-threaded speed, though they face higher power consumption and weaker iGPU performance compared to AMD....Read more

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laptopmedia.com
18/07/2022
Comparison: Intel Core i7-1255U vs. Intel Core i7-11800H

LaptopMedia compares the 15W Intel Core i7-1255U (Alder Lake) and the 45W Core i7-11800H (Tiger Lake), highlighting a generational shift where the efficient hybrid architecture of the 12th Gen chip competes closely with the higher-power 11th Gen processor. While the i7-11800H dominates in 3D rendering with 55% better Cinebench performance, the i7-1255U excels in 2D tasks, finishing...Read more

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laptopspirit.fr
Diverses dates
Core i7-1255U - LaptopSpirit (Tests and reviews of equipped PCs)

The Intel Core i7-1255U is a versatile 10-core, 12-thread, 10nm "Intel 7" low-consumption processor frequently found in ultrabooks. It excels in daily productivity, office tasks, and multimedia consumption thanks to its hybrid architecture. The processor's integrated Intel Iris Xe graphics (96 EUs) provide decent visual performance for light media editing, though it is not intended...Read more

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laptopmedia.com
18/07/2022
Intel Core i7-1255U vs. Intel Core i7-11800H Comparison: How Far Can the New Architecture Go?

The LaptopMedia comparison between the 12th Gen Intel Core i7-1255U and the 11th Gen i7-11800H highlights a shift where the 15W, Alder Lake U-series chip challenges the 45W, Tiger Lake H-series in efficiency and everyday productivity. While the i7-11800H dominates in heavy multi-threaded tasks—outperforming the newer chip by roughly 55% in 3D rendering—the i7-1255U boasts superior...Read more

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laptopmedia.com
08/07/2022
Intel Core i7-1255U vs Intel Core i7-11370H Comparison

The LaptopMedia review highlights a significant performance gap between the 12th Gen Core i7-1255U (10 cores, 15W) and the 11th Gen Core i7-11370H (4 cores, 35W), favoring the newer Alder Lake architecture. The i7-1255U offers superior multi-threaded performance, 26% faster 3D rendering, and better efficiency, supporting modern DDR5 memory. Conversely, the i7-11370H often suffers...Read more

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tomsguide.fr
15/01/2023
LG Gram 16Z90Q Review: Only 1.2 kg for this powerful 16-inch ultrabook

The LG Gram 16 (16Z90Q) stands out for its extreme portability, weighing only 1.2 kg while offering a 16-inch, 16:10 WQXGA matte IPS display with 99% DCI-P3 coverage. Powered by 12th-gen Intel Core P-series processors and 16GB of LPDDR5 RAM, it provides a fast experience, though the slim chassis can cause thermal throttling under sustained heavy loads, limiting its performance for...Read more

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charlestech.fr
18/05/2024
Microsoft Surface Laptop 5 Review – Laptop - Charles Tech

The Microsoft Surface Laptop 5 is characterized as an elegant but incremental update focusing on premium build quality, featuring a high-quality aluminum chassis, an optional Alcantara palm rest, and an excellent 3:2 PixelSense touchscreen, according to Charles Tech. Performance is driven by 12th-gen Intel processors, offering up to 50% faster speeds, while the addition of...Read more

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laptopmedia.com
06/07/2022
Intel Core i7-1280P vs Intel Core i7-1255U: the results speak for themselves

According to LaptopMedia, the Intel Core i7-1280P and i7-1255U represent distinct 28W P-series and 15W U-series segments, with the i7-1280P offering superior performance via 14 cores (6 E) and a 24MB cache compared to the 10-core (2 E) i7-1255U. Benchmarks show the i7-1280P providing roughly 60% higher multi-threaded performance in 3D rendering, along with a slightly faster GPU,...Read more

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laptopmedia.com
13/07/2022
Intel Core i7-1255U vs Intel Core i7-1195G7: Is This the Best ULV CPU Intel Ever Made?

The LaptopMedia review highlights the Intel Core i7-1255U as a superior, more efficient processor over the older i7-1195G7, driven by a 10-core hybrid architecture (2 E) that offers significantly better multi-threaded performance, including a 52% advantage in Cinebench R20. While the i7-1195G7 has higher base clocks and a 28W TDP, it often fails to deliver in real-world testing,...Read more

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laptopmedia.com
21/07/2026
Comparison: Intel Core i5-1235U vs Core i7-1255U – Almost Identical

The Intel Core i5-1235U and i7-1255U are nearly identical 10-core/12-thread processors based on the Alder Lake architecture, with the i7 offering only a marginal 0.30 GHz clock speed advantage and 96 execution units against the i5’s 80. Benchmarks reveal the i7-1255U is only about 4% faster in Cinebench 20, making the i5-1235U a better value proposition due to its significantly...Read more

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laptopmedia.com
06/07/2026
Comparison: Intel Core i7-1255U vs AMD Ryzen 7 5800U

LaptopMedia compares the Intel Core i7-1255U and AMD Ryzen 7 5800U, finding that the Ryzen 7 5800U dominates in 3D rendering and multi-threaded performance by 15% to 38% due to its 16-thread structure. In contrast, the Intel i7-1255U leverages its Alder Lake architecture for a slight advantage in single-core tasks and 2D rendering (Photoshop). While the Ryzen chip offers better...Read more

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laptopmedia.com
18/07/2026
Intel Core i7-1255U vs Intel Core i7-11800H comparison – how far can the new architecture go

LaptopMedia compares the 15W Intel Core i7-1255U (Alder Lake) and the 45W Core i7-11800H (Tiger Lake), highlighting a matchup between modern, efficient architecture and raw, high-performance power. While the i7-11800H dominates in 3D rendering with 55% higher performance due to its 8-core/16-thread design, the i7-1255U with its hybrid P-core/E-core setup proves faster in quick 2D...Read more

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laptopmedia.com
25/05/2023
Video Review: HP EliteBook 830 G9 with Core i7-1255U

The HP EliteBook 830 G9 is a premium 13-inch business laptop featuring a rigid 1.27 kg aluminum chassis, a bright 16:10 IPS display (473 nits, 100% sRGB), and a comfortable, spill-resistant keyboard. It delivers strong performance via Intel Core i7-1255U processors, maintaining low operating temperatures and quiet operation under load, paired with robust battery life exceeding 13...Read more

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tweakers.net
22/10/2022
Samsung Galaxy Book2 with Intel i7-1255U and Arc GPU

The Tweakers review of the Samsung Galaxy Book2 Pro evaluates the Intel Arc A350M, concluding it is a significant step for Intel but does not yet challenge NVIDIA's dominance. While the 15-inch, 1.1kg laptop is praised for its thin design, AMOLED display, and port selection, the ultra-slim chassis forces compromises in cooling and physical rigidity. Performance-wise, the Arc A350M...Read more

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notebookcheck.nl
25/12/2022
Microsoft Surface Laptop 5 15, i7-1255U Review

The Microsoft Surface Laptop 5 15 (i7-1255U) is a premium, well-built device featuring an excellent 3:2 PixelSense touchscreen, silent operation, and the addition of Thunderbolt 4 support. While offering a tactile typing experience and solid performance for daily tasks, it is hindered by an outdated design, including thick display bezels and a 720p webcam. The reliance on a U-series...Read more

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N
notebookcheck.nl
25/12/2022
Microsoft Surface Pro 9 Review (Intel Core i7-1255U)

The Microsoft Surface Pro 9 with Intel Core i7-1255U offers a 54% multi-core performance boost over its predecessor, featuring high power limits (35W burst/22W sustained) that result in loud fan noise and high operating temperatures. While the 13-inch 120Hz display is lauded for its 99% sRGB coverage and 454-nit brightness, the device lacks a 3.5mm headphone jack. Pros include...Read more

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