Intel Core i7-7660U vs Intel Core i7-7600U vs Intel Core i7-7820HK

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 i7-7600U

► remove Intel 7600U

The Intel Core i7-7600U is a fast dual-core processor for notebooks based on the Kaby Lake architecture and was announced in January 2017. It integrates 2 CPU cores with Hyper-Threading support clocked at 2.8 - 3.9 GHz (2 core Turbo also 3.9 GHz). Besides two cores, the processor is also equipped with the HD Graphics 620 GPU as well as a dual-channel memory controller (DDR3L-1600/DDR4-2400). It is manufactured in a 14nm process with FinFET transistors.

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

With 2.5 to 3.9 GHz, the Core i7-7600U clocks significantly higher than the old Core i7-6500U (2.5 - 3.1). That means, the i7-7600U is (at the time of announcement in beginning of 2017) the fastest dual core processor for laptops. The performance is sufficient for demanding tasks (except some games that may need four real cores).

Graphics

The integrated Intel HD Graphics 620 has 24 Execution Units (similar to previous HD Graphics 520) running at 300 - 1150 MHz. The performance depends a lot on the memory configuration; it should be comparable to a dedicated Nvidia GeForce 920M in combination with fast DDR4-2133 dual-channel memory.

Contrary to Skylake, Kaby Lake now supports hardware decoding for H.265/HEVC Main 10 with a 10-bit color depth as well as Google's VP9 codec. The dual-core Kaby Lake processors, which were 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, but it can also be reduced to 7.5 Watts by the notebook manufacturers (cTDP down). This will obviously affect the performance, because the Turbo Boost cannot be maintained for longer periods.

Intel Core i7-7820HK

► remove Intel 7820HK

The Intel Core i7-7820HK is a fast quad-core processor for notebooks based on the Kaby Lake architecture and was announced in January 2017. It is the second fastest model of the consumer series at the time of the announcement. Only the i7-7920HQ and Xeon E3-1535M v6 are faster. Besides four cores including Hyper-Threading support running at 2.9 - 3.9 GHz (4 cores up to 3.5 GHz, 2 cores up to 3.7 GHz), the processor is also equipped with the HD Graphics 630 GPU as well as a dual-channel memory controller (DDR3L-1600/DDR4-2400). It is manufactured in a 14nm process with FinFET transistors.

Compared to the Core i7-7820HQ, the 7820HK lacks business features like vPro or TXT support.

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

Due to the higher clock speeds, the performance of the i7-7820HK is slightly faster than the old Skylake top model Core i7-6920HQ (2.9 - 3.8 GHz). The performance is sufficient even for very demanding tasks and on par with powerful desktop quad-core processors.

Graphics

The integrated Intel HD Graphics 630 has 24 Execution Units (similar to previous HD Graphics 530) running at 350 - 1100 MHz. The performance depends a lot on the memory configuration; it should be comparable to a dedicated Nvidia GeForce 920M in combination with fast DDR4-2133 dual-channel memory.

Contrary to Skylake, Kaby Lake now supports hardware decoding for H.265/HEVC Main 10 with a 10-bit color depth as well as Google's VP9 codec. The dual-core Kaby Lake processors, which were 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 45 Watts, but it can also be reduced to 35 Watts by the notebook manufacturers (cTDP down). This will obviously affect the performance, because the Turbo Boost cannot be maintained for longer periods.

Intel Core i7-7660UIntel Core i7-7600UIntel Core i7-7820HK
Intel Core i7Intel Core i7Intel Core i7
Kaby LakeKaby LakeKaby Lake
: Core i7 Kaby Lake
Intel Core i7-7920HQ3100 - 4100 MHz4 / 88 MB
Intel Core i7-7820HQ2900 - 3900 MHz4 / 88 MB
Intel Core i7-7820HK2900 - 3900 MHz4 / 88 MB
Intel Core i7-7700HQ2800 - 3800 MHz4 / 86 MB
Intel Core i7-7567U3500 - 4000 MHz2 / 44 MB
» Intel Core i7-7660U2500 - 4000 MHz2 / 44 MB
Intel Core i7-7600U2800 - 3900 MHz2 / 44 MB
Intel Core i7-7560U2400 - 3800 MHz2 / 44 MB
Intel Core i7-7500U2700 - 3500 MHz2 / 44 MB
Intel Core i7-7Y751300 - 3600 MHz2 / 44 MB
Intel Core i7-7920HQ3100 - 4100 MHz4 / 88 MB
Intel Core i7-7820HQ2900 - 3900 MHz4 / 88 MB
Intel Core i7-7820HK2900 - 3900 MHz4 / 88 MB
Intel Core i7-7700HQ2800 - 3800 MHz4 / 86 MB
Intel Core i7-7567U3500 - 4000 MHz2 / 44 MB
Intel Core i7-7660U2500 - 4000 MHz2 / 44 MB
» Intel Core i7-7600U2800 - 3900 MHz2 / 44 MB
Intel Core i7-7560U2400 - 3800 MHz2 / 44 MB
Intel Core i7-7500U2700 - 3500 MHz2 / 44 MB
Intel Core i7-7Y751300 - 3600 MHz2 / 44 MB
Intel Core i7-7920HQ3100 - 4100 MHz4 / 88 MB
Intel Core i7-7820HQ2900 - 3900 MHz4 / 88 MB
» Intel Core i7-7820HK2900 - 3900 MHz4 / 88 MB
Intel Core i7-7700HQ2800 - 3800 MHz4 / 86 MB
Intel Core i7-7567U3500 - 4000 MHz2 / 44 MB
Intel Core i7-7660U2500 - 4000 MHz2 / 44 MB
Intel Core i7-7600U2800 - 3900 MHz2 / 44 MB
Intel Core i7-7560U2400 - 3800 MHz2 / 44 MB
Intel Core i7-7500U2700 - 3500 MHz2 / 44 MB
Intel Core i7-7Y751300 - 3600 MHz2 / 44 MB
2500 - 4000 MHz2800 - 3900 MHz2900 - 3900 MHz
128 KB128 KB256 KB
512 KB512 KB1 MB
4 MB4 MB8 MB
2 / 42 / 44 / 8
15 15 45
14 14 14
100 °C100 °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-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 - 1150 MHz)Intel HD Graphics 630 (300 - 1150 MHz)
$415 U.S.$393 U.S.$378 U.S.

Cinebench R15 - CPU Multi 64Bit
min: 397     avg: 404     median: 403.5 (9%)     max: 410 Points
0102030405060708090100110120130140150160170180190200210220230240250260270280290300310320330340350360370380390400410Tooltip
min: 242     avg: 339     median: 344 (8%)     max: 379 Points
0102030405060708090100110120130140150160170180190200210220230240250260270280290300310320330340350360370380Tooltip
min: 689     avg: 773     median: 770 (18%)     max: 867 Points
0102030405060708090100110120130140150160170180190200210220230240250260270280290300310320330340350360370380390400410420430440450460470480490500510520530540550560570580590600610620630640650660670680690700710720730740750760770780790800810820830840850860870880890900910920930940Tooltip
Cinebench R15 - CPU Single 64Bit
min: 154     avg: 159     median: 158.5 (71%)     max: 163 Points
min: 112     avg: 153     median: 161 (72%)     max: 164 Points
min: 156     avg: 163     median: 162 (72%)     max: 171 Points
Cinebench R11.5 - CPU Multi 64Bit
min: 4.39     avg: 4.5     median: 4.5 (10%)     max: 4.55 Points
min: 3.62     avg: 3.9     median: 3.9 (9%)     max: 4.16 Points
min: 8.34     avg: 8.6     median: 8.4 (19%)     max: 9.53 Points
Cinebench R11.5 - CPU Single 64Bit
min: 1.84     avg: 1.9     median: 1.9 (73%)     max: 1.89 Points
min: 1.48     avg: 1.8     median: 1.9 (72%)     max: 1.87 Points
min: 1.69     avg: 1.8     median: 1.8 (72%)     max: 1.85 Points
Cinebench R10 - Rendering Single 32Bit
min: 6126     avg: 6170     median: 6169.5 (63%)     max: 6213 Points
min: 5145     avg: 6096     median: 6253 (64%)     max: 6316 Points
min: 6062     avg: 6231     median: 6182 (64%)     max: 6566 Points
Cinebench R10 - Rendering Multiple CPUs 32Bit
min: 13779     avg: 13809     median: 13808.5 (23%)     max: 13838 Points
min: 11324     avg: 12622     median: 12482 (21%)     max: 15012 Points
min: 22793     avg: 23622     median: 23046.5 (39%)     max: 26081 Points
Cinebench R10 - Rendering Multiple CPUs 64Bit
16430 Points (19%)
min: 32769     avg: 34129.5     median: 34129.5 (40%)     max: 35490 Points
Cinebench R10 - Rendering Single CPUs 64Bit
8145 Points (76%)
min: 8465     avg: 8558.5     median: 8558.5 (80%)     max: 8652 Points
wPrime 2.0x - 1024m *
min: 433     avg: 436     median: 435.5 (5%)     max: 438 seconds
min: 436.057     avg: 486     median: 480.5 (6%)     max: 555.715 seconds
min: 179.449     avg: 235     median: 214.3 (3%)     max: 330.9 seconds
wPrime 2.0x - 32m *
min: 12.6     avg: 12.9     median: 12.9 (3%)     max: 13.2 seconds
min: 12.1     avg: 15     median: 13.7 (3%)     max: 19.9 seconds
min: 6.668     avg: 10.4     median: 8.6 (2%)     max: 17.8 seconds
wPrime 1.55 - 1024m *
215 seconds (1%)
wPrime 1.55 - 32m *
17.8 seconds (9%)
WinRAR - Result
min: 2333     avg: 2681     median: 2686 (28%)     max: 2976 KB/s
min: 5114     avg: 5135     median: 5134.5 (53%)     max: 5155 KB/s
X264 HD Benchmark 4.0 - Pass 2
min: 25     avg: 25.3     median: 25.3 (15%)     max: 25.6 fps
min: 19.51     avg: 22.4     median: 22.7 (14%)     max: 23.77 fps
min: 46     avg: 46.9     median: 46.9 (28%)     max: 47.8 fps
X264 HD Benchmark 4.0 - Pass 1
min: 134     avg: 137     median: 136.5 (47%)     max: 139 fps
min: 105.04     avg: 120     median: 121.1 (42%)     max: 130.12 fps
min: 177     avg: 179     median: 178.8 (62%)     max: 180.6 fps
TrueCrypt - Serpent Mean 100MB
0.2 GB/s (10%)
min: 0.238     avg: 0.2     median: 0.2 (11%)     max: 0.248 GB/s
min: 0.416     avg: 0.5     median: 0.4 (19%)     max: 0.609 GB/s
TrueCrypt - Twofish Mean 100MB
0.4 GB/s (11%)
min: 0.4     avg: 0.4     median: 0.4 (11%)     max: 0.416 GB/s
min: 0.71     avg: 0.7     median: 0.7 (20%)     max: 0.831 GB/s
TrueCrypt - AES Mean 100MB
2.4 GB/s (12%)
min: 2.3     avg: 2.4     median: 2.4 (12%)     max: 2.4 GB/s
min: 3.9     avg: 4.2     median: 4.2 (22%)     max: 4.3 GB/s
Blender 2.79 - BMW27 CPU *
1257 Seconds (9%)
3DMark 06 - CPU
min: 5193     avg: 5227     median: 5226.5 (35%)     max: 5260 Points
min: 4570     avg: 4714     median: 4720.5 (32%)     max: 4844 Points
min: 7957     avg: 8098     median: 8038 (54%)     max: 8360 Points
Super Pi mod 1.5 XS 1M *
min: 9     avg: 10.2     median: 9.8 (2%)     max: 13.33 Seconds
min: 9     avg: 9.6     median: 9.6 (2%)     max: 10.5 Seconds
Super Pi mod 1.5 XS 2M *
min: 22     avg: 23.5     median: 22.6 (1%)     max: 30.31 Seconds
min: 20.665     avg: 21.7     median: 21.5 (1%)     max: 23.5 Seconds
Super Pi Mod 1.5 XS 32M *
min: 506.49     avg: 552     median: 542.5 (2%)     max: 688.22 Seconds
min: 490.548     avg: 529     median: 535.2 (2%)     max: 550.2 Seconds
3DMark Vantage - P CPU no PhysX 1280x1024
12748 Points (18%)
30280 Points (42%)
3DMark 11 - Performance Physics 1280x720
min: 4463     avg: 5069     median: 5230 (24%)     max: 5513 points
min: 1706     avg: 4360     median: 4575 (21%)     max: 5004 points
min: 9542     avg: 10034     median: 10019 (45%)     max: 10523 points
3DMark - Ice Storm Standard Physics 1280x720
min: 23959     avg: 38587     median: 40889.5 (26%)     max: 50904 Points
min: 51307     avg: 53563     median: 52699.5 (34%)     max: 59600 Points
3DMark - Ice Storm Extreme Physics 1920x1080
min: 28540     avg: 39426     median: 39313 (47%)     max: 48085 Points
min: 50796     avg: 53623     median: 52515.5 (63%)     max: 59482 Points
3DMark - Ice Storm Unlimited Physics 1280x720 offscreen
57582 Points (67%)
min: 45972     avg: 48807     median: 47780 (55%)     max: 52354 Points
min: 51327     avg: 54058     median: 52784.5 (61%)     max: 60127 Points
3DMark - Cloud Gate Standard Physics 1280x720
min: 3823     avg: 3936     median: 3935.5 (10%)     max: 4048 Points
min: 3334     avg: 3727     median: 3768.5 (10%)     max: 4114 Points
min: 7905     avg: 8141     median: 8001.5 (20%)     max: 9050 Points
3DMark - Fire Strike Physics 1920x1080
min: 5412     avg: 5561     median: 5560.5 (17%)     max: 5709 Points
min: 4806     avg: 5372     median: 5430.5 (17%)     max: 5929 Points
min: 11041     avg: 11381     median: 11174 (35%)     max: 12592 Points
Geekbench 3 - 64 Bit Multi-Core Score
8570 Points (13%)
8312 Points (13%)
14990 Points (23%)
Geekbench 3 - 64 Bit Single-Core Score
4074 Points (83%)
4080 Points (83%)
3885 Points (79%)
Geekbench 3 - 32 Bit Multi-Core Score
min: 7427     avg: 7749     median: 7748.5 (14%)     max: 8070 Points
min: 14323     avg: 15088     median: 14476 (26%)     max: 16465 Points
Geekbench 3 - 32 Bit Single-Core Score
min: 3486     avg: 3693     median: 3693 (76%)     max: 3900 Points
min: 3718     avg: 4002     median: 3926 (81%)     max: 4361 Points
Geekbench 4.0 - 64 Bit Single-Core Score
4603 Points (73%)
4272 Points (68%)
min: 4867     avg: 4905     median: 4904.5 (78%)     max: 4942 Points
Geekbench 4.0 - 64 Bit Multi-Core Score
8952 Points (22%)
7978 Points (19%)
min: 15042     avg: 15309     median: 15308.5 (37%)     max: 15575 Points
Geekbench 4.4 - 64 Bit Single-Core Score
4786 Points (75%)
4386 Points (69%)
min: 4841     avg: 4897     median: 4896.5 (77%)     max: 4952 Points
Geekbench 4.4 - 64 Bit Multi-Core Score
9320 Points (16%)
8278 Points (14%)
min: 15838     avg: 16002     median: 16001.5 (28%)     max: 16165 Points
Mozilla Kraken 1.1 - Total Score *
min: 927     avg: 938     median: 937.7 (2%)     max: 948.4 ms
min: 914     avg: 995     median: 944.6 (2%)     max: 1257.7 ms
min: 901.2     avg: 2277     median: 984 (2%)     max: 7545 ms
Sunspider - 1.0 Total Score *
min: 65.2     avg: 65.6     median: 65.6 (1%)     max: 66 ms
min: 62.5     avg: 65.2     median: 64.3 (1%)     max: 69.8 ms
min: 68.3     avg: 138     median: 71.1 (1%)     max: 400.9 ms
Octane V2 - Total Score
min: 35767     avg: 36437     median: 36436.5 (70%)     max: 37106 Points
min: 24529     avg: 35704     median: 37194.5 (71%)     max: 40798 Points
min: 35189     avg: 38766     median: 39000 (74%)     max: 40652 Points
Power Consumption - Prime95 V28,10 Stress Power Consumption (external Monitor) ultra *
100%
1 7660U +
min: 39.2     avg: 40     median: 40 (11%)     max: 40.8 Watt
99%
1 7600U +
42.3 Watt (11%)
Power Consumption - Cinebench R15 Multi Power Consumption (external Monitor) ultra *
100%
1 7660U +
min: 39.2     avg: 40     median: 40 (11%)     max: 40.8 Watt
101%
1 7600U +
35.4 Watt (9%)

Average Benchmarks Intel Core i7-7660U → 100%

Average Benchmarks Intel Core i7-7600U → 96%

Average Benchmarks Intel Core i7-7820HK → 141%

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

v1.11
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Redaktion, 2017-09- 8 (Update: 2017-09-11)