Intel Core i7-7660U vs Intel Core i7-7500U

Intel Core i7-7660U

► remove Intel 7660U

The Intel Core i7-7660U is a fast dual-core SoC for notebooks and Ultrabooks based on the Kaby Lake architecture and was announced in January 2017. The CPU has two processor cores clocked at 2.5-4 GHz (two cores up to 3.8 GHz). The processor can execute up to four threads simultaneously thanks to Hyper Threading. It is also equipped with an Intel Iris Plus Graphics 640 GPU with 64 MB eDRAm, a dual-channel memory controller (DDR4) as well as VP9 and H.265 video decoding as well as encoding. The chip is still manufactured in a 14nm process with FinFET transistors.

Compared to the Core i7-7600U, the 7660 does have a higher single-core Turbo of 4 GHz (+100 MHz), but a lower dual-core Turbo (-100 MHz) and a lower base frequency (-300 MHz). However, the CPU part can also use the 64 MB eDRAM as L5 cache.

Architecture

Intel basically uses the same micro architecture compared to Skylake, so the per-MHz performance does not differ. The manufacturer only reworked the Speed Shift technology for faster dynamic adjustments of voltages and clocks, and the improved 14nm process allows much higher frequencies combined with better efficiency than before.

Performance

At 2.5-4 GHz, the Core i7-7660U has a slightly lower frequency (except for the single-core Turbo) compared to the Core i7-7600U, but the CPU part can also use the 64 MB eDRAM, so the performance should be similar.

Graphics

The integrated Intel Iris Plus 640 Graphics is the GT3e model of the Kaby Lake GPU (Intel Gen. 9.5). It has 48 Execution Units running at 300-1050 MHz and the performance is comparable to a GeForce 920MX thanks to fast eDRAM cache. However, there aren't any significant improvements compared to the old Iris Pro 540, so modern games can often not be played smoothly or only at the lowest or medium settings, respectively.

Contrary to Skylake, Kaby lake now also supports H.265/HEVC Main 10 with a 10-bit color depth as well as Google's VP9 codec. The dual-core Kaby Lake processors announced in January should also support HDCP 2.2.

Power Consumption

The chip is manufactured in an improved 14nm process with FinFET transistors, which improves the efficiency even further. Intel still specifies the TDP with 15 Watts, which is typical for ULV chips. Depending on the usage scenario, the TDP can vary between 7.5 (cTDP Down) and 25 Watts.

Intel Core i7-7500U

► remove Intel 7500U

The Intel Core i7-7500U is a dual-core processor of the Kaby Lake architecture. It offers two CPU cores clocked at 2.7 - 3.5 GHz and integrates HyperThreading to work with up to 4 threads at once. The architectural differences are rather small compared to the Skylake generation, therefore the performance per MHz is very similar. The SoC includes a dual channel DDR4 memory controller and Intel HD Graphics 620 graphics card (clocked at 300 - 1050 MHz). It is manufactured in an improved 14nm FinFET process (14nm+) at Intel. Compared to the old Skylake Core i7-6500U (2.5 - 3.1 GHz), the i7-7500U clock speed is up to 400 MHz higher.

 

 

Intel Core i7-7660UIntel Core i7-7500U
Intel Core i7Intel Core i7
Kaby LakeKaby Lake
: Core i7 Kaby Lake
Intel Core i7-7920HQ (compare)3100 - 4100 MHz4 / 88 MB
Intel Core i7-7820HQ (compare)2900 - 3900 MHz4 / 88 MB
Intel Core i7-7820HK (compare)2900 - 3900 MHz4 / 88 MB
Intel Core i7-7700HQ (compare)2800 - 3800 MHz4 / 86 MB
Intel Core i7-7567U (compare)3500 - 4000 MHz2 / 44 MB
» Intel Core i7-7660U2500 - 4000 MHz2 / 44 MB
Intel Core i7-7600U (compare)2800 - 3900 MHz2 / 44 MB
Intel Core i7-7560U (compare)2400 - 3800 MHz2 / 44 MB
Intel Core i7-7500U2700 - 3500 MHz2 / 44 MB
Intel Core i7-7Y75 (compare)1300 - 3600 MHz2 / 44 MB
Intel Core i7-7920HQ (compare)3100 - 4100 MHz4 / 88 MB
Intel Core i7-7820HQ (compare)2900 - 3900 MHz4 / 88 MB
Intel Core i7-7820HK (compare)2900 - 3900 MHz4 / 88 MB
Intel Core i7-7700HQ (compare)2800 - 3800 MHz4 / 86 MB
Intel Core i7-7567U (compare)3500 - 4000 MHz2 / 44 MB
Intel Core i7-7660U2500 - 4000 MHz2 / 44 MB
Intel Core i7-7600U (compare)2800 - 3900 MHz2 / 44 MB
Intel Core i7-7560U (compare)2400 - 3800 MHz2 / 44 MB
» Intel Core i7-7500U2700 - 3500 MHz2 / 44 MB
Intel Core i7-7Y75 (compare)1300 - 3600 MHz2 / 44 MB
2500 - 4000 MHz2700 - 3500 MHz
128 KB128 KB
512 KB512 KB
4 MB4 MB
2 / 42 / 4
15 15
14 14
100 °C100 °C
BGA1356BGA1356
Dual-Channel DDR4 Memory Controller, HyperThreading, AVX, AVX2, Quick Sync, Virtualization, AES-NIDual-Channel DDR4 Memory Controller, HyperThreading, AVX, AVX2, Quick Sync, Virtualization, AES-NI
iGPUIntel Iris Plus Graphics 640 (300 - 1050 MHz)Intel HD Graphics 620 (300 - 1050 MHz)
$415 U.S.$393 U.S.
Intel Core i7 7500U

Cinebench R15 - CPU Multi 64Bit
min: 397     avg: 403.5     median: 403 (9%)     max: 410 Points
min: 265     avg: 338.4     median: 340 (8%)     max: 376 Points
Cinebench R15 - CPU Single 64Bit
min: 154     avg: 158.5     median: 158 (72%)     max: 163 Points
min: 110     avg: 141.8     median: 144 (66%)     max: 149 Points
Cinebench R11.5 - CPU Multi 64Bit
4.5 Points (10%)
min: 3     avg: 3.8     median: 3 (7%)     max: 4 Points
Cinebench R11.5 - CPU Single 64Bit
1.9 Points (94%)
1.6 Points (82%)
Cinebench R10 - Rendering Single 32Bit
min: 6126     avg: 6169.5     median: 6169 (67%)     max: 6213 Points
min: 4835     avg: 5604.7     median: 5647 (62%)     max: 5722 Points
Cinebench R10 - Rendering Multiple CPUs 32Bit
min: 13779     avg: 13808.5     median: 13808 (21%)     max: 13838 Points
min: 9726     avg: 11830.8     median: 11745 (18%)     max: 12981 Points
Cinebench R10 - Rendering Multiple CPUs 64Bit
min: 14099     avg: 15061     median: 15362 (20%)     max: 15817 Points
Cinebench R10 - Rendering Single CPUs 64Bit
min: 6047     avg: 7000.4     median: 7265 (70%)     max: 7305 Points
wPrime 2.0x - 1024m *
min: 433     avg: 435.5     median: 435 (5%)     max: 438 seconds
min: 423     avg: 492.6     median: 485 (6%)     max: 602 seconds
wPrime 2.0x - 32m *
min: 12     avg: 12.9     median: 12 (2%)     max: 13 seconds
min: 13     avg: 14.3     median: 14 (3%)     max: 16 seconds
WinRAR - Result
min: 1983     avg: 2542     median: 2561 (30%)     max: 3011 KB/s
X264 HD Benchmark 4.0 - Pass 2
25.3 fps (1%)
min: 20     avg: 22     median: 21 (1%)     max: 23 fps
X264 HD Benchmark 4.0 - Pass 1
min: 134     avg: 136.5     median: 136 (50%)     max: 139 fps
min: 109     avg: 118.7     median: 116 (43%)     max: 133 fps
TrueCrypt - Serpent Mean 100MB
0.2 GB/s (12%)
0.2 GB/s (11%)
TrueCrypt - Twofish Mean 100MB
0.4 GB/s (13%)
0.4 GB/s (12%)
TrueCrypt - AES Mean 100MB
2.4 GB/s (12%)
min: 1     avg: 2.1     median: 2 (10%)     max: 2 GB/s
Blender 2.79 *
1257 Seconds (13%)
3DMark 06 - CPU
min: 5193     avg: 5226.5     median: 5226 (35%)     max: 5260 Points
min: 3690     avg: 4423.4     median: 4579 (31%)     max: 4921 Points
Super Pi mod 1.5 XS 1M *
min: 10     avg: 10.8     median: 10 (2%)     max: 11 Seconds
Super Pi mod 1.5 XS 2M *
min: 24     avg: 24.8     median: 24 (1%)     max: 25 Seconds
Super Pi Mod 1.5 XS 32M *
min: 543     avg: 576.8     median: 575 (3%)     max: 615 Seconds
3DMark Vantage - P CPU no PhysX 1280x1024
min: 11456     avg: 12602.7     median: 12732 (18%)     max: 13682 Points
3DMark 11 - Performance Physics 1280x720
min: 4463     avg: 5068.7     median: 5230 (27%)     max: 5513 points
min: 2983     avg: 4494.2     median: 4538 (23%)     max: 5246 points
3DMark - Ice Storm Standard Physics 1280x720
min: 28860     avg: 39596.9     median: 40263 (26%)     max: 47877 Points
3DMark - Ice Storm Extreme Physics 1920x1080
min: 28817     avg: 40062.4     median: 40419 (48%)     max: 46962 Points
3DMark - Ice Storm Unlimited Physics 1280x720 offscreen
57582 Points (67%)
min: 41855     avg: 46680.3     median: 47434 (55%)     max: 49751 Points
3DMark - Cloud Gate Standard Physics 1280x720
min: 3823     avg: 3935.5     median: 3935 (10%)     max: 4048 Points
min: 296     avg: 3627.5     median: 3748 (9%)     max: 4143 Points
3DMark - Fire Strike Physics 1920x1080
min: 5412     avg: 5560.5     median: 5560 (17%)     max: 5709 Points
min: 4005     avg: 5389.2     median: 5453 (17%)     max: 5882 Points
Geekbench 3 - 64 Bit Multi-Core Score
8570 Points (23%)
min: 7645     avg: 7945.5     median: 7945 (21%)     max: 8246 Points
Geekbench 3 - 64 Bit Single-Core Score
4074 Points (83%)
min: 3587     avg: 3731     median: 3731 (76%)     max: 3875 Points
Geekbench 3 - 32 Bit Multi-Core Score
min: 6872     avg: 7441.6     median: 7635 (9%)     max: 7835 Points
Geekbench 3 - 32 Bit Single-Core Score
min: 3211     avg: 3462.1     median: 3526 (72%)     max: 3706 Points
Geekbench 4.0 - Compute OpenCL Score
29573 Points (10%)
min: 17181     avg: 19491.6     median: 19360 (7%)     max: 23336 Points
Geekbench 4.0 - 64 Bit Multi-Core Score
8952 Points (30%)
min: 7282     avg: 7982.9     median: 8070 (27%)     max: 8449 Points
Geekbench 4.0 - 64 Bit Single-Core Score
4603 Points (77%)
min: 4033     avg: 4191.4     median: 4151 (69%)     max: 4375 Points
Geekbench 4.4 - 64 Bit Single-Core Score
4786 Points (76%)
min: 4415     avg: 4440     median: 4440 (70%)     max: 4465 Points
Geekbench 4.4 - 64 Bit Multi-Core Score
9320 Points (16%)
min: 8740     avg: 8762     median: 8762 (15%)     max: 8784 Points
Mozilla Kraken 1.1 - Total Score *
min: 927     avg: 937.7     median: 937 (2%)     max: 948 ms
min: 959     avg: 1043.8     median: 1041 (2%)     max: 1282 ms
Sunspider - 1.0 Total Score *
min: 65     avg: 65.6     median: 65 (1%)     max: 66 ms
min: 69     avg: 82.7     median: 78 (1%)     max: 141 ms
Octane V2 - Total Score
min: 35767     avg: 36436.5     median: 36436 (70%)     max: 37106 Points
min: 28609     avg: 34302.3     median: 35028 (67%)     max: 37473 Points
PCMark for Android - Work performance score
242 Points (1%)
Power Consumption - Prime95 V28,10 Stress Power Consumption (external Monitor) ultra *
100%
1 7660U +
min: 39     avg: 40     median: 40 (9%)     max: 40 Watt
Power Consumption - Cinebench R15 Multi Power Consumption (external Monitor) ultra *
100%
1 7660U +
min: 39     avg: 40     median: 40 (7%)     max: 40 Watt

Average Benchmarks Intel Core i7-7660U → 100%

Average Benchmarks Intel Core i7-7500U → 94%

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* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation

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Redaktion, 2017-09- 8 (Update: 2017-09-11)