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

Intel Core i5-6600K

The Intel Core i5-6600K operates with 4 cores and 4 CPU threads. It run at 3.90 GHz base 3.60 GHz all cores while the TDP is set at 91 W.The processor is attached to the LGA 1151 CPU socket. This version includes 6.00 MB of L3 cache on one chip, supports 2 memory channels to support DDR3-1600, DDR4-2133 RAM and features 3.0 PCIe Gen 16 lanes. Tjunction keeps below -- degrees C. In particular, Skylake S Architecture is enhanced with 14 nm technology and supports VT-x, VT-x EPT, VT-d. The product was launched on Q3/2015

Intel Core i5-6600K

The Intel Core i5-6400 operates with 4 cores and 4 CPU threads. It run at 3.30 GHz base 3.00 GHz all cores while the TDP is set at 65 W.The processor is attached to the LGA 1151 CPU socket. This version includes 6.00 MB of L3 cache on one chip, supports 2 memory channels to support DDR3-1600, DDR4-2133 RAM and features 3.0 PCIe Gen 16 lanes. Tjunction keeps below -- degrees C. In particular, Skylake S Architecture is enhanced with 14 nm technology and supports VT-x, VT-x EPT, VT-d. The product was launched on Q3/2015


Compare Detail

3.50 GHz Frequency 2.70 GHz
4 Cores 4
3.90 GHz Turbo (1 Core) 3.30 GHz
3.60 GHz Turbo (All Cores) 3.00 GHz
uncheck No Hyperthreading No
check Yes Overclocking No uncheck
normal Core Architecture normal
Intel HD Graphics 530 GPU Intel HD Graphics 530
1.15 GHz GPU (Turbo) 1.15 GHz
14 nm Technology 14 nm
1.15 GHz GPU (Turbo) 1.15 GHz
12 DirectX Version 12
3 Max. displays 3
DDR3-1600
DDR4-2133
Memory DDR3-1600
DDR4-2133
2 Memory channels 2
Max memory
uncheck No ECC No uncheck
-- L2 Cache --
6.00 MB L3 Cache 6.00 MB
3.0 PCIe version 3.0
16 PCIe lanes 16
14 nm Technology 14 nm
LGA 1151 Socket LGA 1151
91 W TDP 65 W
VT-x, VT-x EPT, VT-d Virtualization VT-x, VT-x EPT, VT-d
Q3/2015 Release date Q3/2015

Cinebench R23 (Single-Core)

Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.

Intel Core i5-6600K 1,047 (49%)
49% Complete
0% Complete

Cinebench R23 (Multi-Core)

Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.

Intel Core i5-6600K 3,966 (5%)
5% Complete
0% Complete

Cinebench R20 (Single-Core)

Cinebench R20 is the successor of Cinebench R15 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.

48% Complete
Intel Core i5-6400 280 (34%)
34% Complete

Cinebench R20 (Multi-Core)

Cinebench R20 is the successor of Cinebench R15 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.

Intel Core i5-6600K 1,573 (6%)
6% Complete
Intel Core i5-6400 1,062 (4%)
4% Complete

Cinebench R15 (Single-Core)

Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.

56% Complete
Intel Core i5-6400 146 (48%)
48% Complete

Cinebench R15 (Multi-Core)

Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.

6% Complete
5% Complete

Geekbench 5, 64bit (Single-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.

Intel Core i5-6600K 1,113 (53%)
53% Complete
Intel Core i5-6400 847 (40%)
40% Complete

Geekbench 5, 64bit (Multi-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.

Intel Core i5-6600K 3,634 (10%)
10% Complete
Intel Core i5-6400 2,707 (7%)
7% Complete

iGPU - FP32 Performance (Single-precision GFLOPS)

The theoretical computing performance of the internal graphics unit of the processor with simple accuracy (32 bit) in GFLOPS. GFLOPS indicates how many billion floating point operations the iGPU can perform per second.

4% Complete
4% Complete

Blender 2.81 (bmw27)

Blender is a free 3D graphics software for rendering (creating) 3D bodies, which can also be textured and animated in the software. The Blender benchmark creates predefined scenes and measures the time (s) required for the entire scene. The shorter the time required, the better. We selected bmw27 as the benchmark scene.

Intel Core i5-6600K 486.54 (24%)
24% Complete
Intel Core i5-6400 735 (36%)
36% Complete

Geekbench 3, 64bit (Single-Core)

Geekbench 3 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.

Intel Core i5-6600K 4,155 (60%)
60% Complete
Intel Core i5-6400 3,509 (51%)
51% Complete

Geekbench 3, 64bit (Multi-Core)

Geekbench 3 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.

Intel Core i5-6600K 12,153 (13%)
13% Complete
Intel Core i5-6400 10,073 (11%)
11% Complete

Cinebench R11.5, 64bit (Single-Core)

Cinebench 11.5 is based on the Cinema 4D Suite, a software that is popular to generate forms and other stuff in 3D. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.

Intel Core i5-6600K 2.07 (76%)
76% Complete
Intel Core i5-6400 1.76 (64%)
64% Complete

Cinebench R11.5, 64bit (Multi-Core)

Cinebench 11.5 is based on the Cinema 4D Suite, a software that is popular to generate forms and other stuff in 3D. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.

Intel Core i5-6600K 6.57 (12%)
12% Complete
Intel Core i5-6400 5.45 (10%)
10% Complete

Cinebench R11.5, 64bit (iGPU, OpenGL)

Cinebench 11.5 is based on the Cinema 4D Suite, a software that is popular to generate forms and other stuff in 3D. The iGPU test uses the CPU internal graphic unit to execute OpenGL commands.

Intel Core i5-6600K 36.27 (59%)
59% Complete
Intel Core i5-6400 36.27 (59%)
59% Complete

Estimated results for PassMark CPU Mark

Some of the CPUs listed below have been benchmarked by CPU-Comparison. However the majority of CPUs have not been tested and the results have been estimated by a CPU-Comparison’s secret proprietary formula. As such they do not accurately reflect the actual Passmark CPU mark values and are not endorsed by PassMark Software Pty Ltd.

Intel Core i5-6600K 8,289 (9%)
9% Complete
Intel Core i5-6400 6,870 (8%)
8% Complete
Electric Usage Estimate

Electric Usage Estimate

Electric Usage Estimate

Electric Usage Estimate

Intel Core i5-6600K Intel Core i5-6400
91 W Max TDP 65 W
NA Power consumption per day (kWh) NA
NA Running cost per day NA
NA Power consumption per year (kWh) NA
NA Running cost per year NA

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