Intel Core M 5y51 Review | 78 Data compared

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  • Avg. price in UK: ~£250
  • Avg. price in US: ~$280
  • PassMark benchmark result: 2002
  • N. of physical cores: 2
  • CPU boost clock speed: 2.6 GHz

Intel Core M 5y51 review. Compare 78 technical specifications and user reviews to see how it ranks among processors and if it is worth buying.

4.3

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%

4.3

Technical Score

10.0%

?

User score

Poor
4.3

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%

3.7

Performance

18.0%

4.8

Cache & Architecture

10.0%

3.3

Memory & PCIe

7.0%

7.6

Power & Thermal

4.0%

6.7

Platform

1.0%

6.4

Integrated Graphics

Poor
?

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

  • 3.2
    Gaming

    Score components:

    30.0%

    1.3

    PassMark single-core benchmark score

    25.0%

    9.0

    Geekbench 6 single-core benchmark score

    20.0%

    1.0

    CPU boost clock speed

    17.0%

    1.6

    L3 cache

    8.0%

    1.0

    N. of physical cores

  • 1.4
    Video editing

    Score components:

    45.0%

    1.3

    Geekbench 6 multi-core benchmark score

    20.0%

    1.0

    N. of physical cores

    20.0%

    1.6

    CPU threads

    15.0%

    1.6

    L3 cache

  • No image
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Best prices in UK

    N/A~ £250

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 M-5Y51 is a dual-core, four-thread mobile processor built on the 14nm Broadwell-Y architecture, featuring a base clock of 1.1 GHz and a maximum turbo boost of 2.6 GHz. Its primary strengths are its extremely low 4.5W TDP and 4MB L3 cache, which allow for passive cooling in ultra-thin tablets and fanless laptops while maintaining sufficient performance for office and multimedia tasks. However, it suffers from significant performance degradation under continuous heavy workloads due to strict power and thermal limits, and its integrated Intel HD Graphics 5300 is ill-suited for modern 3D gaming.

Technical Specifications of processor Intel Core M 5y51

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

4.3
Intel Core M 5y51 has a technical score of 4.27 points, which is lower than that of 72.8% 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 M 5y51 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%

4.3

Overall score

40.0%

9.2

Price

5.8
Intel Core M 5y51 has a quality-to-price ratio of 5.8 points, which is lower than 73.6% 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 M 5y51 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

FCBGA1234
Intel Core M 5y51 uses the FCBGA1234 CPU socket, which is older than that of 94% of processors and equal to that of 0.3% 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

Z790, B660
Intel Core M 5y51 supports Z790, B660 chipsets, which is broader compatibility than 79% of processors and equal to that of 1.2% of processors.
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 M 5y51 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+

2
Intel Core M 5y51 has 2 CPU cores, which is fewer than 79.3% of processors and equal to 20.6% 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+

4
Intel Core M 5y51 offers 4 CPU threads, which is fewer than 67.3% of processors and equal to 26.6% 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

2
Intel Core M 5y51 offers 2 threads per core, which is more than 30.4% of processors and equal to 69.6% of processors.
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

2.6 GHz
Intel Core M 5y51 reaches a boost clock of 2.6 GHz which is lower than that of 96.9% of processors and equal to that of 0.9% 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 1.1 GHz
Intel Core M 5y51 has a base clock of 2x1.1 GHz which is equal to that of 100% of processors.
Show more
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

14 nm
Intel Core M 5y51 uses a 14 nm process node, which is older than that of 50.8% of processors and equal to that of 33.7% 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 14 nm
Intel Core M 5y51 is built on the Intel 14 nm foundry process, which is less advanced than that of 55.2% of processors and equal to that of 29.3% 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

4 MB
Intel Core M 5y51 has an L3 cache of 4 MB which is smaller than that of 70.2% of processors and equal to that of 14.6% 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

0.5 MB
Intel Core M 5y51 has an L2 cache of 0.5 MB which is smaller than that of 84.8% of processors and equal to that of 15.2% 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

?
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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

DDR3L/LPDDR3
Intel Core M 5y51 supports DDR DDR3L/LPDDR3, which is older than that of 83.2% of processors and equal to that of 0.8% 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

1,600 MHz
Intel Core M 5y51 supports memory speeds up to 1600 MHz, which is lower than that of 87.3% of processors and equal to 11.3% 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

?
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

16 GB
Intel Core M 5y51 supports up to 16 GB of memory, which is less than 91.7% of processors and equal to 6.4% 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 M 5y51 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 HD Graphics 5300
Intel Core M 5y51 uses the Intel HD Graphics 5300 integrated GPU, which is less advanced than that in 65.1% of processors and equal to that in 0.3% 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

24
Intel Core M 5y51 has 24 GPU execution units, which is more than 49.2% of processors and equal to 21.6% 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 M 5y51 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

H.264 (HW decode/encode), H.265 (HW decode), VP8 (HW decode)
Intel Core M 5y51 supports H.264 (HW decode/encode), H.265 (HW decode), VP8 (HW decode) media codecs, which is broader support than 54.6% of processors and equal to 0.1% of processors.
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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

4.5 W
Intel Core M 5y51 has a TDP of 4.5 W which is lower than that of 99.1% of processors and equal to that of 0.9% 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

4.5 W
Intel Core M 5y51 has a base power of 4.5 W which is lower than that of 99.1% of processors and equal to that of 0.9% 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

6 W
Intel Core M 5y51 has a boost power of 6 W which is lower than that of 98.5% of processors and equal to that of 1.2% 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 M 5y51 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 M 5y51 supports configurable TDP. 52.9% of processors support configurable TDP.
cTDP: 6 W
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Intel Core M 5y51 vs the average processor

  • 90% lower base power
    Intel Core M 5y51 has a lower base power draw than the average processor (4.5 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 M 5y51 has a lower base power draw than the average processor (4.5 W vs 45 W). The average processor has a base power draw of 45 W.4.5 W vs 45 W
  • 90.6% lower boost power
    Intel Core M 5y51 has a lower boost power draw than the average processor (6 W vs 64 W). The average processor has a boost power draw of 64 W.
    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

    Intel Core M 5y51 has a lower boost power draw than the average processor (6 W vs 64 W). The average processor has a boost power draw of 64 W.6 W vs 64 W
  • 53.9% smaller die size
    Intel Core M 5y51 has a lower die size than the average processor (82 mm² vs 178 mm²). The average processor has a die size of 178 mm².
    What it is: The physical area of the processor die, usually measured in square millimeters.
    When it matters: When you are comparing chip scale, packaging density, or broader design differences rather than direct user-visible performance.

    Importance: LOW

    Good value: <150 mm²

    Intel Core M 5y51 has a lower die size than the average processor (82 mm² vs 178 mm²). The average processor has a die size of 178 mm².82 mm² vs 178 mm²
  • 90% lower TDP
    Intel Core M 5y51 has a lower TDP than the average processor (4.5 W vs 45 W). The average processor has a TDP of 45 W.
    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

    Intel Core M 5y51 has a lower TDP than the average processor (4.5 W vs 45 W). The average processor has a TDP of 45 W.4.5 W vs 45 W
  • 5 °C lower CPU temperature
    Intel Core M 5y51 has a lower CPU temperature than the average processor (95 °C vs 100 °C). The average processor runs at a CPU temperature of 100 °C.
    What it is: The reported operating temperature of the processor.
    When it matters: When you monitor thermals, cooling, or system stability.

    Importance: LOW

    Good value: <100 °C

    Intel Core M 5y51 has a lower CPU temperature than the average processor (95 °C vs 100 °C). The average processor runs at a CPU temperature of 100 °C.95 °C vs 100 °C
  • 16.7% more L3 per core
    Intel Core M 5y51 has more L3 cache per core than the average processor (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 M 5y51 has more L3 cache per core than the average processor (2 MB/core vs 1.714 MB/core). The average processor provides 1.714 MB/core of L3 cache per core.2 MB/core vs 1.714 MB/core
  • 53.9% smaller die size
    Intel Core M 5y51 has a lower die size than the average processor (82 mm² vs 178 mm²). The average processor has a die size of 178 mm².
  • 16.7% more L3 per core
    Intel Core M 5y51 has more L3 cache per core than the average processor (2 MB/core vs 1.714 MB/core). The average processor provides 1.714 MB/core of L3 cache per core.
  • 90% lower base power
    Intel Core M 5y51 has a lower base power draw than the average processor (4.5 W vs 45 W). The average processor has a base power draw of 45 W.
  • 90.6% lower boost power
    Intel Core M 5y51 has a lower boost power draw than the average processor (6 W vs 64 W). The average processor has a boost power draw of 64 W.
  • 90% lower TDP
    Intel Core M 5y51 has a lower TDP than the average processor (4.5 W vs 45 W). The average processor has a TDP of 45 W.
  • 5 °C lower CPU temperature
    Intel Core M 5y51 has a lower CPU temperature than the average processor (95 °C vs 100 °C). The average processor runs at a CPU temperature of 100 °C.
  • Narrower instruction support
    Intel Core M 5y51 supports a narrower instruction set than the average processor (SSE4.1, SSE4.2, AVX2 vs MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, F16C, FMA3, AES, SHA).
  • 6 year/s older release date
    Intel Core M 5y51 has an older release date than the average processor (2,014 vs 2,020).
    October 2014
  • Older CPU socket
    Intel Core M 5y51 uses an older CPU socket than the average processor (FCBGA1,234 vs FP2).
  • No crypto acceleration
    Intel Core M 5y51 does not include crypto acceleration, the average processor does.
  • 39.5% lower boost clock
    Intel Core M 5y51 has a lower boost clock speed than the average processor (2.6 GHz vs 4.3 GHz). The average processor reaches boost clock speed of 4.3 GHz.
  • 47.9% weaker single-core performance
    Intel Core M 5y51 has a lower PassMark single-core score than the average processor (1,294 vs 2,483). The average processor scores 2,483 in PassMark single-core.
  • 4 fewer CPU cores
    Intel Core M 5y51 has fewer CPU cores than the average processor (2 vs 6). The average processor has 6 CPU cores.
  • 81% lower PassMark score
    Intel Core M 5y51 has a lower PassMark benchmark score than the average processor (2,002 vs 10,532.5). The average processor scores 10,532.5 in PassMark benchmark.
  • 72.1% lower multi-core score
    Intel Core M 5y51 has a lower Geekbench 6 multi-core score than the average processor (1,338 vs 4,793). The average processor scores 4,793 in Geekbench 6 multi-core.
  • 4 fewer CPU threads
    Intel Core M 5y51 has fewer CPU threads than the average processor (4 vs 8). The average processor has 8 CPU threads.
  • 37.5% lower bus transfer rate
    Intel Core M 5y51 has a lower bus transfer rate than the average processor (5 GT/s vs 8 GT/s). The average processor offers bus transfer rate of 8 GT/s.
  • 37.5% lower bus speed
    Intel Core M 5y51 has a lower bus speed than the average processor (5 GT/s vs 8 GT/s). The average processor runs at bus speed of 8 GT/s.
  • 17 lower clock multiplier
    Intel Core M 5y51 has a lower clock multiplier than the average processor (11 vs 28). The average processor has a clock multiplier of 28.
  • 80% smaller L2 cache
    Intel Core M 5y51 has a lower L2 cache than the average processor (0.5 MB vs 2.5 MB). The average processor has L2 cache of 2.5 MB.
  • 16.7% larger process node
    Intel Core M 5y51 has a higher process node than the average processor (14 nm vs 12 nm). The average processor uses a process node of 12 nm.
  • 50% less L2 per core
    Intel Core M 5y51 has less L2 cache per core than the average processor (0.3 MB/core vs 0.5 MB/core). The average processor provides 0.5 MB/core of L2 cache per core.
  • 50% smaller L3 cache
    Intel Core M 5y51 has a lower L3 cache than the average processor (4 MB vs 8 MB). The average processor has L3 cache of 8 MB.
  • 73.7% fewer transistors
    Intel Core M 5y51 has fewer transistors than the average processor (1.3 billion vs 4.95 billion). The average processor has 4.95 billion transistors.
  • Less advanced microarchitecture
    Intel Core M 5y51 uses a less advanced microarchitecture than the average processor (Broadwell vs Kaby Lake).
  • 44.1% lower memory bandwidth
    Intel Core M 5y51 has a lower memory bandwidth than the average processor (25.6 GB/s vs 45.8 GB/s). The average processor offers memory bandwidth of 45.8 GB/s.
  • 45.4% lower memory speed
    Intel Core M 5y51 has a lower maximum memory speed than the average processor (1,600 MHz vs 2,933 MHz). The average processor supports memory speed of 2,933 MHz.
  • Older PCIe version
    Intel Core M 5y51 supports an older PCIe version than the average processor (2 vs 3.0).
  • 4 fewer PCIe lanes
    Intel Core M 5y51 has fewer PCIe lanes than the average processor (12 vs 16). The average processor offers 16 PCIe lanes.
  • Older DDR support
    Intel Core M 5y51 supports an older DDR generation than the average processor (DDR3L/LPDDR3 vs DDR4).
  • 75% less memory capacity
    Intel Core M 5y51 has fewer maximum memory capacity than the average processor (16 GB vs 64 GB). The average processor supports 64 GB of memory.
  • Narrower media codec support
    Intel Core M 5y51 supports fewer media codecs than the average processor (H.264 (HW decode/encode), H.265 (HW decode), VP8 (HW decode) vs H.264 (HW decode/encode), H.265 (HW decode/encode), VP9 (HW decode/encode), AV1 (HW decode)).
  • 5 °C lower TJ Max
    Intel Core M 5y51 has a lower TJ Max than the average processor (95 °C vs 100 °C). The average processor has a TJ Max of 100 °C.
  • 39.5% lower boost clock
    Intel Core M 5y51 has a lower boost clock speed than the average processor (2.6 GHz vs 4.3 GHz). The average processor reaches boost clock speed of 4.3 GHz.
    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

    Intel Core M 5y51 has a lower boost clock speed than the average processor (2.6 GHz vs 4.3 GHz). The average processor reaches boost clock speed of 4.3 GHz.2.6 GHz vs 4.3 GHz
  • 47.9% weaker single-core performance
    Intel Core M 5y51 has a lower PassMark single-core score than the average processor (1,294 vs 2,483). The average processor scores 2,483 in PassMark single-core.
    What it is: A benchmark score that reflects single-core CPU performance.
    When it matters: When you care about responsiveness in lighter or older software.

    Importance: HIGH

    Good value: >3200

    Intel Core M 5y51 has a lower PassMark single-core score than the average processor (1,294 vs 2,483). The average processor scores 2,483 in PassMark single-core.1,294 vs 2,483
  • 4 fewer CPU cores
    Intel Core M 5y51 has fewer CPU cores than the average processor (2 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 M 5y51 has fewer CPU cores than the average processor (2 vs 6). The average processor has 6 CPU cores.2 vs 6
  • 81% lower PassMark score
    Intel Core M 5y51 has a lower PassMark benchmark score than the average processor (2,002 vs 10,532.5). The average processor scores 10,532.5 in PassMark benchmark.
    What it is: A benchmark score that gives a broad idea of overall processor performance.
    When it matters: When you want a quick overall performance comparison.

    Importance: HIGH

    Good value: >19000

    Intel Core M 5y51 has a lower PassMark benchmark score than the average processor (2,002 vs 10,532.5). The average processor scores 10,532.5 in PassMark benchmark.2,002 vs 10,532.5
  • 72.1% lower multi-core score
    Intel Core M 5y51 has a lower Geekbench 6 multi-core score than the average processor (1,338 vs 4,793). The average processor scores 4,793 in Geekbench 6 multi-core.
    What it is: A Geekbench 6 score that reflects multi-core CPU performance in mixed modern workloads.
    When it matters: When you want a quick picture of multi-core speed in everyday mixed workloads, multitasking, and broadly optimized software.

    Importance: HIGH

    Good value: >8500

    Intel Core M 5y51 has a lower Geekbench 6 multi-core score than the average processor (1,338 vs 4,793). The average processor scores 4,793 in Geekbench 6 multi-core.1,338 vs 4,793
  • Narrower instruction support
    Intel Core M 5y51 supports a narrower instruction set than the average processor (SSE4.1, SSE4.2, AVX2 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 M 5y51 supports a narrower instruction set than the average processor (SSE4.1, SSE4.2, AVX2 vs MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, F16C, FMA3, AES, SHA).SSE4.1, SSE4.2, AVX2 vs MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, F16C, FMA3, AES, SHA
  • 80% smaller L2 cache
    Intel Core M 5y51 has a lower L2 cache than the average processor (0.5 MB vs 2.5 MB). The average processor has L2 cache of 2.5 MB.
    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

    Intel Core M 5y51 has a lower L2 cache than the average processor (0.5 MB vs 2.5 MB). The average processor has L2 cache of 2.5 MB.0.5 MB vs 2.5 MB
  • 16.7% larger process node
    Intel Core M 5y51 has a higher process node than the average processor (14 nm vs 12 nm). The average processor uses a process node of 12 nm.
    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

    Intel Core M 5y51 has a higher process node than the average processor (14 nm vs 12 nm). The average processor uses a process node of 12 nm.14 nm vs 12 nm

Graphic comparison of Intel Core M 5y51 and other processors

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Third-party reviews

What customers like about Intel Core M 5y51?

  • Extremely low power consumption (4.5W TDP) which allows for long battery life
  • Enables super-thin, lightweight, and fanless (silent) laptop designs
  • Capable of handling day-to-day office tasks, web browsing with many tabs, and 4K video playback
  • Good 'burst' performance for short tasks like opening applications due to a wide turbo range
  • Supports modern features for its era, including hardware virtualization and AES encryption

What customers dislike about Intel Core M 5y51?

  • Performance degrades significantly under continuous heavy load due to thermal/TDP limitations
  • Weak multi-threaded performance compared to standard Core i5/i7 mobile processors
  • Outdated and unsuitable for modern gaming or high-resolution video editing (beyond 2K)
  • Integrated HD 5300 graphics provide very basic performance, often limited to low settings in older games
  • Clock speeds are highly dependent on the device's specific cooling solution, leading to inconsistent performance across different laptops

Expert reviews

C
cpubenchmark.net
(Updated Daily)

The Intel Core M-5Y51 is a Broadwell-Y dual-core processor designed for fanless, ultra-low-power devices, featuring a 4.5W TDP that enables efficient, silent operation. Performance highlights include a 1.10 GHz base clock with turbo boost up to 2.60 GHz, ideal for snappy, bursty tasks, though it suffers from significant thermal throttling under sustained heavy loads. The chip...Read more

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browser.geekbench.com
(Updated Daily)

The Intel Core M-5Y51 is a 14nm Broadwell-Y dual-core processor, designed for fanless, ultra-thin devices such as the 2015 MacBook. Operating between 1.1 GHz and 2.6 GHz, it delivers an average Geekbench 6 single-core score of 732 and multi-core score of 1,339, positioning it as a low-power, entry-level solution. Key advantages include a 4.5W TDP for exceptional power efficiency and...Read more

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notebookcheck.net
03/09/2015

The HP Elite x2 1011 G1 is a robust 11.6-inch business convertible featuring high-end security (fingerprint/SmartCard readers, TPM) and durable build quality, offering silent, fanless performance with an Intel Core M-5Y51 processor. While the dual-battery system delivers excellent runtime, the device is heavy (1.65 kg with keyboard) and offers only basic performance, with an...Read more

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browser.geekbench.com
10/04/2015

The early 2015 12-inch MacBook with a 1.2 GHz Intel Core M-5Y51 offers extreme portability and a 2304 x 1440 Retina display, averaging a 732 single-core and 1339 multi-core score. Pros include a fanless, silent design and an excellent display, while cons center on limited performance for intensive tasks, a single USB-C port, and a shallow "butterfly" keyboard. With 8GB RAM and 512GB...Read more

T
trustedreviews.com
15/10/2015

The HP Elite x2 1011 G1 is positioned as a durable, business-focused hybrid featuring a robust, MIL-STD 810G-certified magnesium-and-aluminum design, boasting a comfortable, backlit keyboard. Key pros include an exceptional battery setup with cells in both the tablet and keyboard dock, yielding nearly 15 hours of life, alongside strong security features. However, the device is heavy...Read more

T
techadvisor.com
14/12/2015

The HP EliteBook 1020 G1 is a premium, fanless executive laptop featuring a durable, high-quality milled aluminum and magnesium alloy chassis. A key pro is its superior connectivity for its class, which includes two USB 3.0 ports and a full HDMI port, alongside a comfortable keyboard with white backlighting. However, the 12.5-inch QHD touchscreen is highly reflective and uses PWM...Read more

C
chip.de
12/03/2015

The 12-inch MacBook, reviewed by CHIP, showcases Intel's 14nm "Broadwell" Core M processor, enabling an exceptionally thin, silent, and fanless design. Key strengths include high portability, an exceptional Retina display, and silent operation, though performance is limited to basic tasks rather than heavy duty computing. Significant drawbacks highlighted include limited...Read more

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laptopmedia.com
30/03/2026

The Intel Core M-5Y51 is a highly efficient Broadwell-Y generation mobile processor designed for ultra-thin, fanless laptops and tablets. Operating at a 4.5W TDP, this 2-core/4-thread chip delivers a base clock of 1.10 GHz, boosting up to 2.60 GHz for quick, silent performance. The chip excels at short-burst tasks like office work and web browsing, with integrated Intel HD Graphics...Read more

V
valid.x86.fr
15/02/2026

a little longer The Intel Core i9-14900KS, featured in this CPU-Z benchmark, is a highly binned Raptor Lake Refresh flagship boasting 24 cores (8P/16E) and a record-breaking 6.2 GHz maximum turbo speed. It stands as a top-tier performer in single-threaded tasks and gaming for enthusiasts. A major advantage of this processor is its unmatched out-of-the-box clock speeds and superior...Read more

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laptopmedia.com
12/05/2015

The Intel Core M-5Y51 is a 14nm Broadwell-Y dual-core processor designed for fanless, ultra-thin devices, offering silent operation and efficient handling of standard office tasks. A major pro is its low 4.5W TDP, while a significant con is aggressive thermal throttling that drops performance under sustained loads. The integrated HD Graphics 5300 supports 4K output and light gaming,...Read more

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cnetfrance.fr
05/12/2014

The HP EliteBook Folio 1020 is a 12.5-inch business Ultrabook featuring a durable magnesium-aluminum chassis (MIL-STD 810G), a fanless design for silent operation, and a 15.7mm thick, 1.2kg frame. It stands out with an excellent backlit keyboard and high-resolution display options (1080p or QHD), though the ForcePad trackpad requires adjustment. While ideal for productivity, the...Read more

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noticias.compudemano.com
30/10/2015

The HP EliteBook Folio 1020 is a premium, ultra-lightweight business laptop featuring a fanless design, MIL-STD 810G durability, and a high-resolution, accurate 12.5-inch display. Key advantages include its robust build quality, comfortable keyboard, and silent operation, making it ideal for mobile professionals. However, its Intel Core M-5Y71 processor struggles with heavy...Read more

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notebookcheck.it
18/12/2014

The HP Envy x2-j001ng is a 13.3-inch Windows 8.1 convertible featuring a premium machined aluminum casing and a silent, fanless design powered by the Intel Core M-5Y70 processor. A key highlight is the 1080p IPS touchscreen, which offers excellent brightness (368.3 cd/m²) and contrast (1300:1). Additional, high-quality audio is provided by Beats Audio speakers. While the processor...Read more

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