Intel Core i5-6600K vs Intel Core i5-6400

Intel Core i5-6600K

► remove Intel 6600K

The Intel Core i5-6600K is a high-end quad-core desktop processor based on the Skylake architecture, which was announced in August 2015. The CPU, which is manufactured in a 14 nm process, runs at 3.5 up to 3.9 GHz (2 cores: 3.8 GHz, 3 cores: 3.7 GHz, 4 cores: 3.6 GHz) and – contrary to the i7-series – does not support Hyperthreading. Being a so called "K"-model, the Core i5-6600K has a free multiplier and can be easily overclocked. 

Performance

Because of the slightly slower clocks, the smaller L3-cache (6 instead of 8 MB) as well as the missing Hyperthreading support, the Core i5-6600K is about 10-30 percent slower than the top model i7-6700K. The CPU will still handle demanding applications and games without any problems.

Graphics

Graphics are handled by the integrated Intel HD Graphics 530 with 24 EUs (Execution Units), which is clocked at 350 - 1150 MHz. Compared to the HD Graphics 4600 (Haswell, 20 EUs), the performance is increased by around 25 percent. The overall GPU performance is still low-end, so modern games can, if at all, only be played smoothly with low settings. 

Power Consumption

The TDP was slightly raised from 88 to 91 Watts compared to the predecessor.

Intel Core i5-6400

► remove

The Intel Core i5-6400 is a desktop class quad-core CPU. The additional 4 threads are not available to the CPU as it is missing the HyperThreading support. The i5-6400 is based on Skylake architecture and clocks within the 2.7 GHz to 3.3 GHz range. 

Intel Core i5-6600KIntel Core i5-6400
Intel Core i5 (Desktop)Intel Core i5 (Desktop)
SkylakeSkylake
: Core i5 (Desktop) Skylake
» Intel Core i5-6600K3500 - 3900 MHz4 / 46 MB
Intel Core i5-6500 compare3200 - 3600 MHz4 / 46 MB
Intel Core i5-6600T compare2700 - 3500 MHz4 / 46 MB
Intel Core i5-64002700 - 3300 MHz4 / 46 MB
Intel Core i5-6500T compare2500 - 3100 MHz4 / 46 MB
Intel Core i5-6400T compare2200 - 2800 MHz4 / 46 MB
Intel Core i5-6600K3500 - 3900 MHz4 / 46 MB
Intel Core i5-6500 compare3200 - 3600 MHz4 / 46 MB
Intel Core i5-6600T compare2700 - 3500 MHz4 / 46 MB
» Intel Core i5-64002700 - 3300 MHz4 / 46 MB
Intel Core i5-6500T compare2500 - 3100 MHz4 / 46 MB
Intel Core i5-6400T compare2200 - 2800 MHz4 / 46 MB
3500 - 3900 MHz2700 - 3300 MHz
256 KB256 KB
1 MB1 MB
6 MB6 MB
4 / 44 / 4
91 65
14 14
FCLGA1151FCLGA1151
DDR3(L)-1600/DDR4-2133 Memory Controller, AVX, AVX2, AES-NI, TSX-NI, Quick Sync, Virtualization, vPro saveDDR3(L)-1600/DDR4-2133 Memory Controller, AVX, AVX2, AES-NI, TSX-NI, Quick Sync, Virtualization, vPro
iGPUIntel HD Graphics 530 (350 - 1150 MHz)Intel HD Graphics 530 (350 - 950 MHz)
$242 U.S.$187 U.S.
Intel Core i5 (Desktop) 6600KIntel Core i5 (Desktop) 6400

Cinebench R15 - CPU Multi 64Bit
min: 601     avg: 615     median: 601.5 (14%)     max: 654 Points
510 Points (12%)
Cinebench R15 - CPU Single 64Bit
min: 161     avg: 166     median: 166 (74%)     max: 169 Points
134 Points (60%)
Cinebench R11.5 - CPU Multi 64Bit
min: 6.93     avg: 7.1     median: 6.9 (16%)     max: 7.5 Points
5.9 Points (14%)
Cinebench R11.5 - CPU Single 64Bit
min: 1.88     avg: 1.9     median: 1.9 (73%)     max: 2.03 Points
1.5 Points (59%)
Cinebench R10 - Rendering Single 32Bit
6188 Points (64%)
5088 Points (52%)
Cinebench R10 - Rendering Multiple CPUs 32Bit
21324 Points (36%)
18297 Points (31%)
Cinebench R10 - Rendering Multiple CPUs 64Bit
100%
1 6600K +
29100 Points (34%)
Cinebench R10 - Rendering Single CPUs 64Bit
100%
1 6600K +
8370 Points (78%)
wPrime 2.10 - 1024m *
100%
1 6400 +
327 seconds (4%)
wPrime 2.10 - 32m *
100%
1 6400 +
10.5 seconds (2%)
WinRAR - Result
100%
1 6600K +
3643 KB/s (37%)
X264 HD Benchmark 4.0 - Pass 2
40.1 fps (24%)
33.9 fps (20%)
X264 HD Benchmark 4.0 - Pass 1
196 fps (68%)
150 fps (52%)
TrueCrypt - Serpent Mean 100MB
0.3 GB/s (0%)
0.3 GB/s (0%)
TrueCrypt - Twofish Mean 100MB
0.5 GB/s (0%)
0.4 GB/s (0%)
TrueCrypt - AES Mean 100MB
3.2 GB/s (0%)
2.7 GB/s (0%)
3DMark 06 - CPU - CPU Score
100%
1 6600K +
7413 Points (50%)
Super Pi mod 1.5 XS 1M - 1M *
9.5 Seconds (2%)
12 Seconds (3%)
Super Pi mod 1.5 XS 2M - 2M *
21.5 Seconds (1%)
100%
6400 +
27.6 Seconds (1%)
Super Pi Mod 1.5 XS 32M - 32M *
501 Seconds (2%)
660 Seconds (3%)
3DMark Vantage - P CPU no PhysX 1280x1024
100%
1 6600K +
21951 Points (31%)
3DMark 11 - Performance Physics 1280x720
7754 points (35%)
6283 points (28%)
3DMark - Ice Storm Standard Physics 1280x720
61050 Points (39%)
48092 Points (31%)
3DMark - Ice Storm Extreme Physics 1920x1080
100%
1 6400 +
50839 Points (61%)
3DMark - Ice Storm Unlimited Physics 1280x720 offscreen
100%
1 6400 +
53239 Points (62%)
3DMark - Cloud Gate Standard Physics 1280x720
5562 Points (14%)
4894 Points (12%)
3DMark - Fire Strike Physics 1920x1080
7863 Points (25%)
6903 Points (22%)
Geekbench 3 - 32 Bit Multi-Core Score
100%
1 6600K +
12270 Points (22%)
Geekbench 3 - 32 Bit Single-Core Score
100%
1 6600K +
4080 Points (84%)
Geekbench 3 - 64 Bit Multi-Core Score
100%
1 6600K +
min: 12175     avg: 12545     median: 12544.5 (20%)     max: 12914 Points
Geekbench 3 - 64 Bit Single-Core Score
100%
1 6600K +
min: 4160     avg: 4215     median: 4214.5 (86%)     max: 4269 Points
Mozilla Kraken 1.1 - Total Score *
100%
1 6600K +
850 ms (1%)
Sunspider - 1.0 Total Score *
64.4 ms (1%)
100%
6400 +
82.9 ms (1%)
Octane V2 - Total Score
100%
1 6600K +
43012 Points (82%)

Average Benchmarks Intel Core i5-6600K → 100% n=19

Average Benchmarks Intel Core i5-6400 → 87% n=19

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* 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)