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

Intel Core i5-6600K

► remove from comparison 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 from comparison

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. 

ModelIntel Core i5-6600KIntel Core i5-6400
SeriesIntel Core i5 (Desktop)Intel Core i5 (Desktop)
CodenameSkylakeSkylake
Series: Core i5 (Desktop) Skylake
Intel Core i5-6600K « 3.5 - 3.9 GHz4 / 4 cores6 MB L3
Intel Core i5-6500 compare3.2 - 3.6 GHz4 / 4 cores6 MB L3
Intel Core i5-6600T compare2.7 - 3.5 GHz4 / 4 cores6 MB L3
Intel Core i5-64002.7 - 3.3 GHz4 / 4 cores6 MB L3
Intel Core i5-6500T compare2.5 - 3.1 GHz4 / 4 cores6 MB L3
Intel Core i5-6400T compare2.2 - 2.8 GHz4 / 4 cores6 MB L3
Intel Core i5-6600K3.5 - 3.9 GHz4 / 4 cores6 MB L3
Intel Core i5-6500 compare3.2 - 3.6 GHz4 / 4 cores6 MB L3
Intel Core i5-6600T compare2.7 - 3.5 GHz4 / 4 cores6 MB L3
Intel Core i5-6400 « 2.7 - 3.3 GHz4 / 4 cores6 MB L3
Intel Core i5-6500T compare2.5 - 3.1 GHz4 / 4 cores6 MB L3
Intel Core i5-6400T compare2.2 - 2.8 GHz4 / 4 cores6 MB L3
Clock3500 - 3900 MHz2700 - 3300 MHz
L1 Cache256 KB256 KB
L2 Cache1 MB1 MB
L3 Cache6 MB6 MB
Cores / Threads4 / 44 / 4
TDP91 Watt65 Watt
Technology14 nm14 nm
SocketFCLGA1151FCLGA1151
FeaturesDDR3(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)
Architecturex86x86
$242 U.S.$187 U.S.
Announced
ManufacturerIntel Core i5 (Desktop) 6600KIntel Core i5 (Desktop) 6400

Benchmarks

Cinebench R15 - Cinebench R15 CPU Multi 64 Bit
min: 601     avg: 615     median: 601.5 (6%)     max: 654 Points
510 Points (5%)
Cinebench R15 - Cinebench R15 CPU Single 64 Bit
min: 161     avg: 165.5     median: 166 (51%)     max: 169 Points
134 Points (41%)
Cinebench R11.5 - Cinebench R11.5 CPU Multi 64 Bit
min: 6.93     avg: 7.1     median: 6.9 (10%)     max: 7.5 Points
5.9 Points (8%)
Cinebench R11.5 - Cinebench R11.5 CPU Single 64 Bit
min: 1.88     avg: 1.9     median: 1.9 (6%)     max: 2.03 Points
1.5 Points (5%)
Cinebench R10 - Cinebench R10 Rend. Single (32bit)
6188 Points (50%)
5088 Points (42%)
Cinebench R10 - Cinebench R10 Rend. Multi (32bit)
21324 Points (24%)
18297 Points (21%)
Cinebench R10 - Cinebench R10 Rend. Multi (64bit)
100%
1 6600K +
29100 Points (21%)
Cinebench R10 - Cinebench R10 Rend. Single (64bit)
100%
1 6600K +
8370 Points (46%)
wPrime 2.10 - wPrime 2.0 1024m *
100%
1 6400 +
327.1 s (4%)
wPrime 2.10 - wPrime 2.0 32m *
100%
1 6400 +
10.5 s (2%)
WinRAR - WinRAR 4.0
100%
1 6600K +
3643 Points (21%)
X264 HD Benchmark 4.0 - x264 Pass 2
40.1 fps (15%)
33.9 fps (12%)
X264 HD Benchmark 4.0 - x264 Pass 1
196.3 fps (46%)
150.1 fps (35%)
TrueCrypt - TrueCrypt Serpent
0.3 GB/s (0%)
0.3 GB/s (0%)
TrueCrypt - TrueCrypt Twofish
0.5 GB/s (0%)
0.4 GB/s (0%)
TrueCrypt - TrueCrypt AES
3.2 GB/s (0%)
2.7 GB/s (0%)
3DMark 06 - CPU - 3DMark 06 - CPU
100%
1 6600K +
7413 Points (16%)
Super Pi mod 1.5 XS 1M - Super Pi mod 1.5 XS 1M *
9.5 s (2%)
12 s (3%)
Super Pi mod 1.5 XS 2M - Super Pi mod 1.5 XS 2M *
21.5 s (1%)
100%
6400 +
27.6 s (1%)
Super Pi Mod 1.5 XS 32M - Super Pi mod 1.5 XS 32M *
501 s (2%)
660 s (3%)
3DMark Vantage - 3DM Vant. Perf. CPU no Physx
100%
1 6600K +
21951 Points (20%)
3DMark 11 - 3DM11 Performance Physics
7754 Points (21%)
6283 Points (17%)
3DMark - 3DMark Ice Storm Physics
61050 Points (39%)
48092 Points (31%)
3DMark - 3DMark Ice Storm Extreme Physics
100%
1 6400 +
50839 Points (42%)
3DMark - 3DMark Ice Storm Unlimited Physics
100%
1 6400 +
53239 Points (45%)
3DMark - 3DMark Cloud Gate Physics
5562 Points (14%)
4894 Points (12%)
3DMark - 3DMark Fire Strike Standard Physics
7863 Points (15%)
6903 Points (13%)
Geekbench 3 - Geekbench 3 32 Bit Multi-Core
100%
1 6600K +
12270 Points (22%)
Geekbench 3 - Geekbench 3 32 Bit Single-Core
100%
1 6600K +
4080 Points (80%)
Geekbench 3 - Geekbench 3 64 Bit Multi-Core
100%
1 6600K +
min: 12175     avg: 12545     median: 12544.5 (20%)     max: 12914 Points
Geekbench 3 - Geekbench 3 64 Bit Single-Core
100%
1 6600K +
min: 4160     avg: 4215     median: 4214.5 (63%)     max: 4269 Points
Mozilla Kraken 1.1 - Kraken 1.1 Total Score *
100%
1 6600K +
850 ms (1%)
Sunspider - Sunspider 1.0 Total Score *
64.4 ms (1%)
100%
6400 +
82.9 ms (1%)
Octane V2 - Octane V2 Total Score
100%
1 6600K +
43012 Points (44%)

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

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

- 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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show all (including archived), 2023, 2022
v1.22
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#12 return log +0.027s ... 0.194s

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