OVERALL
SPECS
VS AVERAGE
REVIEWS
ALTERNATIVES

Intel Core i7 6660U Review | 78 Data compared

double-arrow
  • Avg. price: ~£340
  • PassMark benchmark result: 3601
  • N. of physical cores: 2
  • CPU boost clock speed: 3.4 GHz

Intel Core i7 6660U review. Compare 78 technical specifications and user reviews to see how it ranks among processors and if it is worth buying.

3.7

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%

3.7

Technical Score

10.0%

?

User score

Poor
3.7

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%

2.6

Performance

18.0%

4.6

Cache & Architecture

10.0%

3.7

Memory & PCIe

7.0%

7.6

Power & Thermal

4.0%

7.4

Platform

1.0%

7.3

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

  • 2.5
    Gaming

    Score components:

    30.0%

    2.9

    PassMark single-core benchmark score

    25.0%

    3.0

    Geekbench 6 single-core benchmark score

    20.0%

    2.8

    CPU boost clock speed

    17.0%

    1.6

    L3 cache

    8.0%

    1.0

    N. of physical cores

  • 1.3
    Video editing

    Score components:

    45.0%

    1.2

    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
No image

Best prices in UK

    N/A~ £340

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 i7-6660U is a 6th Generation Skylake dual-core mobile processor designed for thin ultrabooks, featuring 2 cores, 4 threads via Hyper-Threading, and a 4 MB Smart Cache. It operates at a base frequency of 2.40 GHz with a max turbo boost of 3.40 GHz and includes integrated Intel Iris Graphics 540 with 64 MB of dedicated eDRAM. Its primary pros include a low 15W TDP (configurable down to 9.5W) for excellent power efficiency and enhanced integrated graphics performance compared to standard HD models. However, its main cons are its aging dual-core architecture, which struggles with modern multi-threaded workloads, and its lack of official support for Windows 11.

Technical Specifications of processor Intel Core i7 6660U

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

3.7
Intel Core i7 6660U has a technical score of 3.66 points, which is lower than that of 91.5% 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 6660U 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%

3.7

Overall score

40.0%

8.7

Price

5.2
Intel Core i7 6660U has a quality-to-price ratio of 5.2 points, which is lower than 93.9% 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 6660U 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

FCBGA1356
Intel Core i7 6660U uses the FCBGA1356 CPU socket, which is older than that of 88.1% of processors and equal to that of 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

Intel 100 Series, Intel 200 Series
Intel Core i7 6660U supports Intel 100 Series, Intel 200 Series chipsets, which is broader compatibility than 50% of processors and equal to that of 2.1% 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 i7 6660U 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.
Show more
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 i7 6660U 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 i7 6660U 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 i7 6660U 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

3.4 GHz
Intel Core i7 6660U reaches a boost clock of 3.4 GHz which is lower than that of 83.7% of processors and equal to that of 2.9% 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 2.4 GHz
Intel Core i7 6660U has a base clock of 2x2.4 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 i7 6660U 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 i7 6660U 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 i7 6660U 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 i7 6660U 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

128 KB
Intel Core i7 6660U has an L1 cache of 128 KB which is smaller than that of 83.1% of processors and equal to that of 14.9% of processors.
Show more
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/DDR4/LPDDR3
Intel Core i7 6660U supports DDR DDR3L/DDR4/LPDDR3, which is older than that of 74.3% of processors and equal to that of 3.3% 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

2,133 MHz
Intel Core i7 6660U supports memory speeds up to 2133 MHz, which is lower than that of 75.6% of processors and equal to 8.8% 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

DDR4-2133 MHz
Intel Core i7 6660U supports JEDEC memory speeds up to DDR4-2133 MHz, which is lower than that of 75.9% of processors and equal to 5.3% 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

32 GB
Intel Core i7 6660U supports up to 32 GB of memory, which is less than 71.9% of processors and equal to 19.5% of processors.
Show more
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 6660U 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 Graphics 540
Intel Core i7 6660U uses the Intel Iris Graphics 540 integrated GPU, which is more advanced than that in 61.9% of processors and equal to that in 0.2% 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

48
Intel Core i7 6660U has 48 GPU execution units, which is more than 82.5% of processors and equal to 4.7% 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 6660U 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.265 (HW decode), VP9 (HW decode), JPEG (HW decode)
Intel Core i7 6660U supports H.265 (HW decode), VP9 (HW decode), JPEG (HW decode) media codecs, which is broader support than 53.7% of processors and equal to 0.2% of processors.
Show more
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 6660U 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 6660U 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

25 W
Intel Core i7 6660U has a boost power of 25 W which is lower than that of 83.1% of processors and equal to that of 9.2% 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 i7 6660U 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 6660U supports configurable TDP. 52.9% of processors support configurable TDP.
cTDP: 9.5 W
Show more

Intel Core i7 6660U vs the average processor

  • 66.7% lower base power
    Intel Core i7 6660U 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 6660U 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
  • 60.9% lower boost power
    Intel Core i7 6660U has a lower boost power draw than the average processor (25 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 i7 6660U has a lower boost power draw than the average processor (25 W vs 64 W). The average processor has a boost power draw of 64 W.25 W vs 64 W
  • 66.7% lower TDP
    Intel Core i7 6660U has a lower TDP than the average processor (15 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 i7 6660U has a lower TDP than the average processor (15 W vs 45 W). The average processor has a TDP of 45 W.15 W vs 45 W
  • 16.7% more L3 per core
    Intel Core i7 6660U 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 i7 6660U 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
  • 2x more GPU execution units
    Intel Core i7 6660U has more GPU execution units than the average processor (48 vs 24). The average processor has 24 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

    Intel Core i7 6660U has more GPU execution units than the average processor (48 vs 24). The average processor has 24 GPU execution units.48 vs 24
  • 16.7% more L3 per core
    Intel Core i7 6660U 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.
  • 2x more GPU execution units
    Intel Core i7 6660U has more GPU execution units than the average processor (48 vs 24). The average processor has 24 GPU execution units.
  • 66.7% lower base power
    Intel Core i7 6660U 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.
  • 60.9% lower boost power
    Intel Core i7 6660U has a lower boost power draw than the average processor (25 W vs 64 W). The average processor has a boost power draw of 64 W.
  • 66.7% lower TDP
    Intel Core i7 6660U has a lower TDP than the average processor (15 W vs 45 W). The average processor has a TDP of 45 W.

Total
Cache & Architecture
Integrated Graphics
Power & Thermal
  • Older CPU socket
    Intel Core i7 6660U uses an older CPU socket than the average processor (FCBGA1,356 vs FP2).
  • 4 year/s older release date
    Intel Core i7 6660U has an older release date than the average processor (2,016 vs 2,020).
    January 2016
  • No crypto acceleration
    Intel Core i7 6660U does not include crypto acceleration, the average processor does.
  • 4 fewer CPU cores
    Intel Core i7 6660U has fewer CPU cores than the average processor (2 vs 6). The average processor has 6 CPU cores.
  • 67.7% weaker multi-core performance
    Intel Core i7 6660U has a lower multi-core performance than the average processor (899 vs 2,783). The average processor scores 2,783 in Cinebench R20 multi-core.
  • 20.9% lower boost clock
    Intel Core i7 6660U has a lower boost clock speed than the average processor (3.4 GHz vs 4.3 GHz). The average processor reaches boost clock speed of 4.3 GHz.
  • 77.5% lower multi-core score
    Intel Core i7 6660U has a lower Geekbench 6 multi-core score than the average processor (1,078 vs 4,793). The average processor scores 4,793 in Geekbench 6 multi-core.
  • 21.8% weaker single-core performance
    Intel Core i7 6660U has a lower PassMark single-core score than the average processor (1,942 vs 2,483). The average processor scores 2,483 in PassMark single-core.
  • 26.7% lower single-core score
    Intel Core i7 6660U has a lower Geekbench 6 single-core score than the average processor (1,078 vs 1,471). The average processor scores 1,471 in Geekbench 6 single-core.
  • 65.8% lower PassMark score
    Intel Core i7 6660U has a lower PassMark benchmark score than the average processor (3,601 vs 10,532.5). The average processor scores 10,532.5 in PassMark benchmark.
  • 4 fewer CPU threads
    Intel Core i7 6660U has fewer CPU threads than the average processor (4 vs 8). The average processor has 8 CPU threads.
  • 50% lower bus transfer rate
    Intel Core i7 6660U has a lower bus transfer rate than the average processor (4 GT/s vs 8 GT/s). The average processor offers bus transfer rate of 8 GT/s.
  • 50% lower bus speed
    Intel Core i7 6660U has a lower bus speed than the average processor (4 GT/s vs 8 GT/s). The average processor runs at bus speed of 8 GT/s.
  • 80% smaller L2 cache
    Intel Core i7 6660U 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 i7 6660U has a higher process node than the average processor (14 nm vs 12 nm). The average processor uses a process node of 12 nm.
  • 66.7% smaller L1 cache
    Intel Core i7 6660U has a lower L1 cache than the average processor (128 KB vs 384 KB). The average processor has L1 cache of 384 KB.
  • 50% less L2 per core
    Intel Core i7 6660U 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 i7 6660U has a lower L3 cache than the average processor (4 MB vs 8 MB). The average processor has L3 cache of 8 MB.
  • Less advanced microarchitecture
    Intel Core i7 6660U uses a less advanced microarchitecture than the average processor (Skylake vs Kaby Lake).
  • 25.5% lower memory bandwidth
    Intel Core i7 6660U has a lower memory bandwidth than the average processor (34.1 GB/s vs 45.8 GB/s). The average processor offers memory bandwidth of 45.8 GB/s.
  • 4 fewer PCIe lanes
    Intel Core i7 6660U has fewer PCIe lanes than the average processor (12 vs 16). The average processor offers 16 PCIe lanes.
  • 27.3% lower memory speed
    Intel Core i7 6660U has a lower maximum memory speed than the average processor (2,133 MHz vs 2,933 MHz). The average processor supports memory speed of 2,933 MHz.
  • 50% less memory capacity
    Intel Core i7 6660U has fewer maximum memory capacity than the average processor (32 GB vs 64 GB). The average processor supports 64 GB of memory.
  • Older DDR support
    Intel Core i7 6660U supports an older DDR generation than the average processor (DDR3L/DDR4/LPDDR3 vs DDR4).
  • Limited PCIe bifurcation
    Intel Core i7 6660U supports less flexible PCIe bifurcation than the average processor (x4, x2/x2, x2/x1/x1, x1/x1/x1/x1 vs x16, x8/x8).
  • Narrower media codec support
    Intel Core i7 6660U supports fewer media codecs than the average processor (H.265 (HW decode), VP9 (HW decode), JPEG (HW decode) vs H.264 (HW decode/encode), H.265 (HW decode/encode), VP9 (HW decode/encode), AV1 (HW decode)).
  • 4 fewer CPU cores
    Intel Core i7 6660U 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 i7 6660U has fewer CPU cores than the average processor (2 vs 6). The average processor has 6 CPU cores.2 vs 6
  • 67.7% weaker multi-core performance
    Intel Core i7 6660U has a lower multi-core performance than the average processor (899 vs 2,783). The average processor scores 2,783 in Cinebench R20 multi-core.
    What it is: A Cinebench R20 score that reflects how well the processor handles long, heavy rendering workloads across many cores.
    When it matters: When you care about sustained multi-core performance in rendering, compiling, heavy creation work, or productivity workloads that use many threads.

    Importance: HIGH

    Good value: >4700

    Intel Core i7 6660U has a lower multi-core performance than the average processor (899 vs 2,783). The average processor scores 2,783 in Cinebench R20 multi-core.899 vs 2,783
  • 20.9% lower boost clock
    Intel Core i7 6660U has a lower boost clock speed than the average processor (3.4 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 i7 6660U has a lower boost clock speed than the average processor (3.4 GHz vs 4.3 GHz). The average processor reaches boost clock speed of 4.3 GHz.3.4 GHz vs 4.3 GHz
  • 77.5% lower multi-core score
    Intel Core i7 6660U has a lower Geekbench 6 multi-core score than the average processor (1,078 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 i7 6660U has a lower Geekbench 6 multi-core score than the average processor (1,078 vs 4,793). The average processor scores 4,793 in Geekbench 6 multi-core.1,078 vs 4,793
  • 21.8% weaker single-core performance
    Intel Core i7 6660U has a lower PassMark single-core score than the average processor (1,942 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 i7 6660U has a lower PassMark single-core score than the average processor (1,942 vs 2,483). The average processor scores 2,483 in PassMark single-core.1,942 vs 2,483
  • 26.7% lower single-core score
    Intel Core i7 6660U has a lower Geekbench 6 single-core score than the average processor (1,078 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 6660U has a lower Geekbench 6 single-core score than the average processor (1,078 vs 1,471). The average processor scores 1,471 in Geekbench 6 single-core.1,078 vs 1,471
  • 65.8% lower PassMark score
    Intel Core i7 6660U has a lower PassMark benchmark score than the average processor (3,601 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 i7 6660U has a lower PassMark benchmark score than the average processor (3,601 vs 10,532.5). The average processor scores 10,532.5 in PassMark benchmark.3,601 vs 10,532.5
  • 80% smaller L2 cache
    Intel Core i7 6660U 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 i7 6660U 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
Total
Overall
Platform
Performance
Cache & Architecture
Memory & PCIe
Integrated Graphics

Graphic comparison of Intel Core i7 6660U and other processors

Attribute category
Attribute
No results found

Third-party reviews

What customers like about Intel Core i7 6660U?

  • Reliable for office tasks, web browsing, and general productivity
  • Efficient power usage with a low 15W Thermal Design Power (TDP)
  • Capable of handling 4K video playback and basic media editing
  • Includes Integrated Intel Iris Graphics 540, which outperforms standard HD graphics of its era
  • Supports multitasking for students and professionals using lighter applications

What customers dislike about Intel Core i7 6660U?

  • Prone to overheating and thermal throttling under heavy workloads
  • Poor performance in modern AAA gaming; only suitable for low-end or retro titles
  • Limited to 2 physical cores and 4 threads, which is inadequate for modern high-demand software
  • High battery drain during demanding tasks despite its low-power rating
  • Performance is significantly surpassed by newer i3 and i5 processors from the 8th generation onwards

Expert reviews

C
cpubenchmark.net
30/03/2026
Intel Core i7-6660U @ 2.40GHz - CPU Benchmarks

The Intel Core i7-6660U is a dual-core 6th Generation Skylake mobile processor (15W TDP) designed for ultrabooks, featuring a 2.40 GHz base clock and 3.40 GHz boost. It offers low power consumption and decent single-thread performance for everyday tasks, with integrated Intel Iris Graphics 540 handling light multimedia. However, it lacks power for modern, demanding, multi-threaded...Read more

X
xdaforums.com
15/08/2020
Alldocube i7Book Review: An affordable laptop powered by Intel i7 CPU

The Alldocube i7Book is a budget 14.1-inch ultrabook utilizing an older Intel Core i7-6660U processor, 8GB DDR4 RAM, and a 256GB SATA SSD to deliver capable, affordable productivity performance in a 1.35kg aluminum chassis. Key advantages include an impressive 8.5+ hour battery life with USB-C PD fast charging, a quality Microsoft Precision touchpad, and a versatile selection of...Read more

B
browser.geekbench.com
01/01/2024
Intel Core i7-6660U Benchmarks - Geekbench Browser

The Intel Core i7-6660U is a 6th Gen Skylake dual-core, ultra-low-voltage processor designed for thin-and-light laptops, featuring a 2.40 GHz base clock, 3.40 GHz turbo boost, and integrated Intel Iris Graphics 540. It excels in efficiency with a 15W TDP and offers respectable single-core performance for daily tasks, but its two-core architecture is limited for modern multi-threaded...Read more

Video reviews

Best alternatives

intel-core-ultra-9-285k
Intel Core Ultra 9 285K

Processors

8.9
amd-ryzen-threadripper-pro-9965wx
AMD Ryzen Threadripper Pro 9965WX

Processors

8.8
amd-ryzen-threadripper-pro-9995wx
AMD Ryzen Threadripper Pro 9995WX

Processors

8.8
amd-ryzen-threadripper-9960x
AMD Ryzen Threadripper 9960X

Processors

8.8
amd-ryzen-threadripper-7970x
AMD Ryzen Threadripper 7970X

Processors

8.7
amd-ryzen-threadripper-pro-9985wx
AMD Ryzen Threadripper Pro 9985WX

Processors

8.7
intel-core-ultra-9-285
Intel Core Ultra 9 285

Processors

8.6
amd-ryzen-threadripper-pro-9975wx
AMD Ryzen Threadripper Pro 9975WX

Processors

8.6
amd-ryzen-threadripper-pro-7985wx
AMD Ryzen Threadripper Pro 7985WX

Processors

8.6
amd-ryzen-9-9950x3d
AMD Ryzen 9 9950x3d

Processors

8.6
intel-core-i9-13900k
Intel Core i9 13900K

Processors

8.5
amd-ryzen-threadripper-pro-7965wx
AMD Ryzen Threadripper Pro 7965WX

Processors

8.5

Compare Intel Core i7 6660U with other processors

VS
VS

Compare