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Intel Core i7-7660U vs Intel Core i7-7700K

Intel Core i7-7660U

► remove from comparison Intel i7-7660U

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 i7-7700K

► remove from comparison Intel i7-7700K

The Intel Core i7-7700K is a fast quad-core processor for desktops based on the Kaby Lake architecture and was announced in January 2017. It is the top model of the consumer Kaby-Lake-H series at the time of the announcement. Besides four cores including Hyper-Threading (8 threads) support running at 4.2 - 4.5 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.

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

Thanks to the 200 (base) and 300 MHz (Boost) higher clock speed, respectively, the i7-7700K is a few percent faster than the old Skylake Core i7-6700K that offers the same per-MHz performance. Therefore, it is a very fast quad-core CPU that offers sufficient performance for all tasks.

Graphics

The integrated Intel HD Graphics 630 has 24 Execution Units (similar to previous HD Graphics 530) running at 350 - 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 slightly. Intel still specifies the TDP with 91 Watts, which is a lot more than the 45 Watts of the mobile Kaby-Lake-H CPUs.

ModelIntel Core i7-7660UIntel Core i7-7700K
SeriesIntel Kaby LakeIntel Kaby Lake
CodenameKaby LakeKaby Lake
Series: Kaby Lake Kaby Lake
Intel Core i7-7700K4.2 - 4.5 GHz4 / 88 MB
Intel Core i7-7700 compare3.6 - 4.2 GHz4 / 88 MB
Intel Xeon E3-1535M v6 compare3.1 - 4.2 GHz4 / 88 MB
Intel Core i7-7920HQ compare3.1 - 4.1 GHz4 / 88 MB
Intel Core i7-7700T compare2.9 - 3.8 GHz4 / 88 MB
Intel Core i5-7600K compare3.8 - 4.2 GHz4 / 48 MB
Intel Xeon E3-1505M v6 compare3 - 4 GHz4 / 88 MB
Intel Core i7-7820HQ compare2.9 - 3.9 GHz4 / 88 MB
Intel Core i7-7820HK compare2.9 - 3.9 GHz4 / 88 MB
Intel Core i7-7700HQ compare2.8 - 3.8 GHz4 / 86 MB
Intel Core i5-7500 compare3.4 - 3.8 GHz4 / 46 MB
Intel Core i5-7440HQ compare2.8 - 3.8 GHz4 / 46 MB
Intel Core i7-7567U compare3.5 - 4 GHz2 / 44 MB
» Intel Core i7-7660U2.5 - 4 GHz2 / 44 MB
Intel Core i7-7600U compare2.8 - 3.9 GHz2 / 44 MB
Intel Core i5-7300HQ compare2.5 - 3.5 GHz4 / 46 MB
Intel Core i5-7500T compare2.7 - 3.3 GHz4 / 46 MB
Intel Core i5-7287U compare3.3 - 3.7 GHz2 / 44 MB
Intel Core i7-7560U compare2.4 - 3.8 GHz2 / 44 MB
Intel Core i5-7267U compare3.1 - 3.5 GHz2 / 44 MB
Intel Core i5-7360U compare2.3 - 3.6 GHz2 / 44 MB
Intel Core i7-7500U compare2.7 - 3.5 GHz2 / 44 MB
Intel Core i5-7300U compare2.6 - 3.5 GHz2 / 43 MB
Intel Core i5-7260U compare2.2 - 3.4 GHz2 / 44 MB
Intel Core i5-7200U compare2.5 - 3.1 GHz2 / 43 MB
Intel Core i3-7100H compare3 GHz2 / 43 MB
Intel Core i3-7167U compare2.8 GHz2 / 43 MB
Intel Core i3-7130U compare2.7 GHz2 / 43 MB
Intel Core i7-7Y75 compare1.3 - 3.6 GHz2 / 44 MB
Intel Core i5-7Y57 compare1.2 - 3.3 GHz2 / 44 MB
Intel Core i5-7Y54 compare1.2 - 3.2 GHz2 / 44 MB
Intel Core i3-7100U compare2.4 GHz2 / 43 MB
Intel Core m3-7Y32 compare1 - 3 GHz2 / 44 MB
Intel Pentium Gold 4415U compare2.3 GHz2 / 42 MB
Intel Core m3-7Y30 compare1 - 2.6 GHz2 / 44 MB
Intel Celeron 3965U compare2.2 GHz2 / 22 MB
Intel Core i3-7020U compare2.3 GHz2 / 43 MB
Intel Celeron 3867U compare1.8 GHz2 / 22 MB
Intel Celeron 3865U compare1.8 GHz2 / 22 MB
Intel Pentium Gold 4425Y compare1.7 GHz2 / 42 MB
Intel Pentium Gold 4415Y compare1.6 GHz2 / 42 MB
Intel Pentium Gold 4410Y compare1.5 GHz2 / 42 MB
Intel Celeron 3965Y compare1.5 GHz2 / 22 MB
» Intel Core i7-7700K4.2 - 4.5 GHz4 / 88 MB
Intel Core i7-7700 compare3.6 - 4.2 GHz4 / 88 MB
Intel Xeon E3-1535M v6 compare3.1 - 4.2 GHz4 / 88 MB
Intel Core i7-7920HQ compare3.1 - 4.1 GHz4 / 88 MB
Intel Core i7-7700T compare2.9 - 3.8 GHz4 / 88 MB
Intel Core i5-7600K compare3.8 - 4.2 GHz4 / 48 MB
Intel Xeon E3-1505M v6 compare3 - 4 GHz4 / 88 MB
Intel Core i7-7820HQ compare2.9 - 3.9 GHz4 / 88 MB
Intel Core i7-7820HK compare2.9 - 3.9 GHz4 / 88 MB
Intel Core i7-7700HQ compare2.8 - 3.8 GHz4 / 86 MB
Intel Core i5-7500 compare3.4 - 3.8 GHz4 / 46 MB
Intel Core i5-7440HQ compare2.8 - 3.8 GHz4 / 46 MB
Intel Core i7-7567U compare3.5 - 4 GHz2 / 44 MB
Intel Core i7-7660U2.5 - 4 GHz2 / 44 MB
Intel Core i7-7600U compare2.8 - 3.9 GHz2 / 44 MB
Intel Core i5-7300HQ compare2.5 - 3.5 GHz4 / 46 MB
Intel Core i5-7500T compare2.7 - 3.3 GHz4 / 46 MB
Intel Core i5-7287U compare3.3 - 3.7 GHz2 / 44 MB
Intel Core i7-7560U compare2.4 - 3.8 GHz2 / 44 MB
Intel Core i5-7267U compare3.1 - 3.5 GHz2 / 44 MB
Intel Core i5-7360U compare2.3 - 3.6 GHz2 / 44 MB
Intel Core i7-7500U compare2.7 - 3.5 GHz2 / 44 MB
Intel Core i5-7300U compare2.6 - 3.5 GHz2 / 43 MB
Intel Core i5-7260U compare2.2 - 3.4 GHz2 / 44 MB
Intel Core i5-7200U compare2.5 - 3.1 GHz2 / 43 MB
Intel Core i3-7100H compare3 GHz2 / 43 MB
Intel Core i3-7167U compare2.8 GHz2 / 43 MB
Intel Core i3-7130U compare2.7 GHz2 / 43 MB
Intel Core i7-7Y75 compare1.3 - 3.6 GHz2 / 44 MB
Intel Core i5-7Y57 compare1.2 - 3.3 GHz2 / 44 MB
Intel Core i5-7Y54 compare1.2 - 3.2 GHz2 / 44 MB
Intel Core i3-7100U compare2.4 GHz2 / 43 MB
Intel Core m3-7Y32 compare1 - 3 GHz2 / 44 MB
Intel Pentium Gold 4415U compare2.3 GHz2 / 42 MB
Intel Core m3-7Y30 compare1 - 2.6 GHz2 / 44 MB
Intel Celeron 3965U compare2.2 GHz2 / 22 MB
Intel Core i3-7020U compare2.3 GHz2 / 43 MB
Intel Celeron 3867U compare1.8 GHz2 / 22 MB
Intel Celeron 3865U compare1.8 GHz2 / 22 MB
Intel Pentium Gold 4425Y compare1.7 GHz2 / 42 MB
Intel Pentium Gold 4415Y compare1.6 GHz2 / 42 MB
Intel Pentium Gold 4410Y compare1.5 GHz2 / 42 MB
Intel Celeron 3965Y compare1.5 GHz2 / 22 MB
Clock2500 - 4000 MHz4200 - 4500 MHz
L1 Cache128 KB256 KB
L2 Cache512 KB1 MB
L3 Cache4 MB8 MB
Cores / Threads2 / 44 / 8
TDP15 Watt91 Watt
Technology14 nm14 nm
max. Temp.100 °C
SocketBGA1356FCLGA1151
FeaturesDual-Channel DDR4 Memory Controller, HyperThreading, AVX, AVX2, Quick Sync, Virtualization, AES-NIDDR3(L)-1600/DDR4-2400 Memory Controller, HyperThreading, AVX, AVX2, AES-NI, TSX-NI, Quick Sync, Virtualization, vPro
iGPUIntel Iris Plus Graphics 640 (300 - 1050 MHz)Intel HD Graphics 630 (350 - 1150 MHz)
Architecturex86x86
$415 U.S.$339 U.S.
Announced

Benchmarks

Cinebench R20 - Cinebench R20 CPU (Single Core)
465 Points (59%)
Cinebench R20 - Cinebench R20 CPU (Multi Core)
2200 Points (9%)
Cinebench R15 - Cinebench R15 CPU Multi 64 Bit
min: 397     avg: 403.5     median: 403.5 (4%)     max: 410 Points
0255075100125150175200225250275300325350375400Tooltip
min: 897     avg: 940     median: 938.5 (10%)     max: 984 Points
050100150200250300350400450500550600650700750800850900950Tooltip
Cinebench R15 - Cinebench R15 CPU Single 64 Bit
min: 154     avg: 158.5     median: 158.5 (49%)     max: 163 Points
min: 190     avg: 192.3     median: 192.5 (59%)     max: 194 Points
Cinebench R11.5 - Cinebench R11.5 CPU Multi 64 Bit
min: 4.39     avg: 4.5     median: 4.5 (8%)     max: 4.55 Points
min: 9.78     avg: 10.4     median: 10.4 (19%)     max: 10.91 Points
Cinebench R11.5 - Cinebench R11.5 CPU Single 64 Bit
min: 1.84     avg: 1.9     median: 1.9 (6%)     max: 1.89 Points
min: 2.18     avg: 2.2     median: 2.2 (7%)     max: 2.2 Points
Cinebench R10 - Cinebench R10 Rend. Single (32bit)
min: 6126     avg: 6170     median: 6169.5 (55%)     max: 6213 Points
min: 7222     avg: 7305     median: 7304.5 (65%)     max: 7387 Points
Cinebench R10 - Cinebench R10 Rend. Multi (32bit)
min: 13779     avg: 13809     median: 13808.5 (19%)     max: 13838 Points
min: 28189     avg: 28903     median: 28903 (39%)     max: 29617 Points
wPrime 2.10 - wPrime 2.0 1024m *
min: 433     avg: 435.5     median: 435.5 (5%)     max: 438 s
min: 169.8     avg: 173.1     median: 173.1 (2%)     max: 176.3 s
wPrime 2.10 - wPrime 2.0 32m *
min: 12.6     avg: 12.9     median: 12.9 (3%)     max: 13.2 s
min: 5.5     avg: 5.6     median: 5.6 (1%)     max: 5.615 s
WinRAR - WinRAR 4.0
5823 Points (34%)
X264 HD Benchmark 4.0 - x264 Pass 2
min: 25     avg: 25.3     median: 25.3 (10%)     max: 25.6 fps
61.6 fps (26%)
X264 HD Benchmark 4.0 - x264 Pass 1
min: 134     avg: 136.5     median: 136.5 (36%)     max: 139 fps
230 fps (61%)
TrueCrypt - TrueCrypt Serpent
0.2 GB/s (0%)
min: 0.54     avg: 0.5     median: 0.5 (0%)     max: 0.554 GB/s
TrueCrypt - TrueCrypt Twofish
0.4 GB/s (0%)
min: 0.919     avg: 0.9     median: 0.9 (0%)     max: 0.939 GB/s
TrueCrypt - TrueCrypt AES
2.4 GB/s (0%)
min: 5.4     avg: 5.5     median: 5.5 (0%)     max: 5.5 GB/s
Blender - Blender 2.79 BMW27 CPU *
1257 Seconds (9%)
3DMark 06 - CPU - 3DMark 06 - CPU
min: 5193     avg: 5227     median: 5226.5 (11%)     max: 5260 Points
10156 Points (22%)
Super Pi mod 1.5 XS 1M - Super Pi mod 1.5 XS 1M *
min: 8.11     avg: 8.2     median: 8.2 (2%)     max: 8.22 s
Super Pi mod 1.5 XS 2M - Super Pi mod 1.5 XS 2M *
min: 18.3     avg: 18.4     median: 18.4 (1%)     max: 18.41 s
Super Pi Mod 1.5 XS 32M - Super Pi mod 1.5 XS 32M *
440 s (2%)
3DMark 11 - 3DM11 Performance Physics
min: 4463     avg: 5069     median: 5230 (18%)     max: 5513 Points
min: 9975     avg: 11450     median: 11813 (41%)     max: 12026 Points
3DMark - 3DMark Ice Storm Physics
min: 64424     avg: 65351     median: 65408 (42%)     max: 66220 Points
3DMark - 3DMark Ice Storm Extreme Physics
66177 Points (55%)
3DMark - 3DMark Ice Storm Unlimited Physics
57582 Points (49%)
67714 Points (57%)
3DMark - 3DMark Cloud Gate Physics
min: 3823     avg: 3936     median: 3935.5 (10%)     max: 4048 Points
min: 9230     avg: 9587     median: 9558 (24%)     max: 9974 Points
3DMark - 3DMark Fire Strike Standard Physics
min: 5412     avg: 5561     median: 5560.5 (13%)     max: 5709 Points
min: 13137     avg: 13702     median: 13672.5 (32%)     max: 14325 Points
3DMark - 3DMark Time Spy CPU
min: 1979     avg: 1990     median: 1989.5 (11%)     max: 2000 Points
min: 5276     avg: 5383     median: 5383 (29%)     max: 5490 Points
Geekbench 4.1 - 4.4 - Geekbench 4.1 - 4.4 64 Bit Single-Core
4786 Points (52%)
Geekbench 4.1 - 4.4 - Geekbench 4.1 - 4.4 64 Bit Multi-Core
9320 Points (12%)
Geekbench 4.0 - Geekbench 4.0 64 Bit Single-Core
4603 Points (71%)
5480 Points (85%)
Geekbench 4.0 - Geekbench 4.0 64 Bit Multi-Core
8952 Points (22%)
17800 Points (43%)
Geekbench 3 - Geekbench 3 64 Bit Multi-Core
8570 Points (13%)
18800 Points (29%)
Geekbench 3 - Geekbench 3 64 Bit Single-Core
4074 Points (67%)
4700 Points (77%)
Geekbench 2 - 32 Bit - Geekbench Stream
12169 Points (98%)
Geekbench 2 - 32 Bit - Geekbench Memory
10472 Points (95%)
Geekbench 2 - 32 Bit - Geekbench Floating Point
17576 Points (34%)
Geekbench 2 - 32 Bit - Geekbench Integer
17183 Points (35%)
Geekbench 2 - 32 Bit - Geekbench Total Score
15476 Points (40%)
Mozilla Kraken 1.1 - Kraken 1.1 Total Score *
min: 927     avg: 938     median: 937.5 (1%)     max: 948 ms
769 ms (1%)
Sunspider - Sunspider 1.0 Total Score *
min: 65.2     avg: 65.6     median: 65.6 (1%)     max: 66 ms
52 ms (1%)
Octane V2 - Octane V2 Total Score
min: 35767     avg: 36437     median: 36436.5 (38%)     max: 37106 Points
Power Consumption - Prime95 Power Consumption - external Monitor *
min: 39.2     avg: 40     median: 40 (7%)     max: 40.8 Watt
145 Watt (25%)
Power Consumption - Cinebench R15 Multi Power Consumption - external Monitor *
min: 39.2     avg: 40     median: 40 (11%)     max: 40.8 Watt
127 Watt (34%)
Power Consumption - Cinebench R15 Multi Power Efficiency - external Monitor
min: 9.73     avg: 10.1     median: 10.1 (12%)     max: 10.5 Points per Watt
7.8 Points per Watt (9%)

Average Benchmarks Intel Core i7-7660U → 100% n=25

Average Benchmarks Intel Core i7-7700K → 180% n=25

- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation

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> Notebook / Laptop Reviews and News > Benchmarks / Tech > Processor Comparison - Head 2 Head
Redaktion, 2017-09- 8 (Update: 2017-09-11)