Intel Core i5-8600K vs Intel Core i5-8400

Intel Core i5-8600K

► remove Intel 8600K

The Intel Core i5-8600K is a high-end desktop processor with six cores based on the Coffee Lake architecture and was announced in September 2017. The processor clocks at between 3.6 and 4.3 GHz and can execute up to six threads simultaneously (no HyperThreading). According to Intel, the CPU is manufactured in an improved 14nm (14nm++) process. The i5-8600K is comparatively easy to overclock thanks to the unlocked multiplier.

Performance

Due to the two additional cores, performance has increased significantly compared to the Core i7-7700K when all cores are in use. Single-core performance has not improved since its Kaby Lake predecessor. As a high-end model, the i5-8600K is suitable for the most demanding applications and games.

Graphics

The integrated Intel UHD Graphics 630 iGPU is basically identical to the previous generation Intel HD Graphics 630. Only some low demanding games are playable with this graphics card (see GPU page linked above).

Power Consumption

Intel specifies the TDP with 95 watts. Therefore, well-dimensioned cooling systems should easily manage to deal with the created heat. We expect increased efficiency due to the higher performance.

Intel Core i5-8400

► remove Intel 8400

The Intel Core i5-8400 is a mid-range 6-core CPU. The processor belongs to the Coffee Lake generation and was presented in September 2017. It does not support Hyper-Threading, which means it can run six threads simultaneously. The base clock rate is 2.8 GHz and the CPU can speed up to 4.0 GHz under high load. Despite belonging to the new generation of CPUs, the Core i5-8400 is manufactured in an improved 14nm process.

Performance

The processor offers a strong performance increase compared to the Core i5-7400 due to its two additional cores. Single-core performance has not improved significantly compared to its Kaby Lake predecessor. As a mid-range model, the Core i5-8400 should be suitable for demanding games and programs.

Graphics

The integrated Intel UHD Graphics 630 iGPU is supposed to offer higher performance as its clock rate has been increased by 50 MHz. The build is identical to that of the Intel HD Graphics 630. We do expect a performance improvement, but as a low-end solution it will probably only display current games smoothly at reduced details - if at all.

Power Consumption

Intel specifies the TDP with 65 watts. Therefore, well-dimensioned cooling systems should easily manage to deal with the created heat. We expect increased efficiency due to the higher performance.

Intel Core i5-8600KIntel Core i5-8400
Intel Core i5 (Desktop)Intel Core i5 (Desktop)
Coffee LakeCoffee Lake
: Core i5 (Desktop) Coffee Lake
» Intel Core i5-8600K3600 - 4300 MHz6 / 69 MB
Intel Core i5-8500 (compare)3000 - 4100 MHz6 / 69 MB
Intel Core i5-84002800 - 4000 MHz6 / 69 MB
Intel Core i5-8500T (compare)2100 - 3500 MHz6 / 69 MB
Intel Core i5-8600K3600 - 4300 MHz6 / 69 MB
Intel Core i5-8500 (compare)3000 - 4100 MHz6 / 69 MB
» Intel Core i5-84002800 - 4000 MHz6 / 69 MB
Intel Core i5-8500T (compare)2100 - 3500 MHz6 / 69 MB
3600 - 4300 MHz2800 - 4000 MHz
384 KB384 KB
1.5 MB1.5 MB
9 MB9 MB
6 / 66 / 6
95 65
14 14
FCLGA1151FCLGA1151
Dual-Channel DDR3(L)-1600/DDR4-2666 Memory Controller, HyperThreading, AVX, AVX2, AES-NI, TSX-NI, Quick Sync, Virtualization, vProDual-Channel DDR3(L)-1600/DDR4-2666 Memory Controller, HyperThreading, AVX, AVX2, AES-NI, TSX-NI, Quick Sync, Virtualization, vPro
iGPUIntel UHD Graphics 630 (350 - 1150 MHz)Intel UHD Graphics 630 (350 - 1050 MHz)
Intel Core i5 (Desktop) 8600KIntel Core i5 (Desktop) 8400

Cinebench R15 - CPU Multi 64Bit
min: 988     avg: 989.5     median: 989.5 (23%)     max: 991 Points
min: 939     avg: 943     median: 941 (22%)     max: 949 Points
Cinebench R15 - CPU Single 64Bit
181 Points (83%)
min: 167     avg: 169.5     median: 169.5 (78%)     max: 172 Points
Cinebench R11.5 - CPU Multi 64Bit
10.8 Points (40%)
102%
8400 +
11 Points (41%)
Cinebench R11.5 - CPU Single 64Bit
2.1 Points (85%)
1.9 Points (78%)
Cinebench R10 - Rendering Single 32Bit
6875 Points (75%)
min: 6356     avg: 6363.5     median: 6363.5 (70%)     max: 6371 Points
Cinebench R10 - Rendering Multiple CPUs 32Bit
32863 Points (66%)
min: 30658     avg: 30789.5     median: 30789.5 (62%)     max: 30921 Points
wPrime 2.0x - 1024m *
188.8 seconds (2%)
100%
8400 +
191.8 seconds (2%)
wPrime 2.0x - 32m *
5.7 seconds (1%)
100%
8400 +
6.2 seconds (1%)
WinRAR - Result
4583 KB/s (54%)
113%
8400 +
5173 KB/s (61%)
X264 HD Benchmark 4.0 - Pass 2
min: 61     avg: 63.4     median: 63.4 (2%)     max: 65.7 fps
61.4 fps (2%)
X264 HD Benchmark 4.0 - Pass 1
min: 230.3     avg: 232.7     median: 232.7 (86%)     max: 235 fps
223.8 fps (83%)
TrueCrypt - Serpent Mean 100MB
0.5 GB/s (28%)
0.5 GB/s (26%)
TrueCrypt - Twofish Mean 100MB
0.9 GB/s (30%)
0.8 GB/s (28%)
TrueCrypt - AES Mean 100MB
5.4 GB/s (28%)
5 GB/s (26%)
Blender 2.79 *
100%
8400 +
488 Seconds (5%)
3DMark 06 - CPU
9078 Points (63%)
104%
8400 +
9474 Points (66%)
Super Pi mod 1.5 XS 1M *
min: 8.72     avg: 8.8     median: 8.8 (2%)     max: 8.8 Seconds
100%
8400 +
9.5 Seconds (2%)
Super Pi mod 1.5 XS 2M *
min: 19.674     avg: 19.7     median: 19.7 (1%)     max: 19.8 Seconds
100%
8400 +
21.6 Seconds (1%)
Super Pi Mod 1.5 XS 32M *
min: 488.9     avg: 496.4     median: 496.4 (2%)     max: 503.9 Seconds
100%
8400 +
526 Seconds (2%)
3DMark Vantage - P CPU no PhysX 1280x1024
100%
8400 +
35310 Points (59%)
3DMark 11 - Performance Physics 1280x720
min: 10708     avg: 10833     median: 10833 (58%)     max: 10958 points
min: 9057     avg: 9453     median: 9453 (51%)     max: 9849 points
3DMark - Ice Storm Standard Physics 1280x720
74934 Points (48%)
3DMark - Ice Storm Extreme Physics 1920x1080
74763 Points (89%)
65891 Points (78%)
3DMark - Ice Storm Unlimited Physics 1280x720 offscreen
100%
8400 +
69971 Points (81%)
3DMark - Cloud Gate Standard Physics 1280x720
min: 8492     avg: 8522.5     median: 8522.5 (22%)     max: 8553 Points
7891 Points (20%)
3DMark - Fire Strike Physics 1920x1080
min: 12916     avg: 13018.5     median: 13018.5 (48%)     max: 13121 Points
min: 10911     avg: 11774.3     median: 12066 (45%)     max: 12346 Points
Geekbench 3 - 32 Bit Multi-Core Score
18970 Points (61%)
Geekbench 3 - 32 Bit Single-Core Score
4217 Points (87%)
Geekbench 3 - 64 Bit Multi-Core Score
19770 Points (53%)
19334 Points (51%)
Geekbench 3 - 64 Bit Single-Core Score
4417 Points (90%)
4283 Points (87%)
Geekbench 4.0 - Compute OpenCL Score
100%
8400 +
207800 Points (72%)
Geekbench 4.0 - 64 Bit Multi-Core Score
100%
8400 +
19500 Points (71%)
Geekbench 4.0 - 64 Bit Single-Core Score
100%
8400 +
4996 Points (87%)
Geekbench 4.3 - 64 Bit Single-Core Score
100%
8400 +
5104 Points (81%)
Geekbench 4.3 - 64 Bit Multi-Core Score
100%
8400 +
20500 Points (57%)
Mozilla Kraken 1.1 - Total Score *
1021.6 ms (2%)
Sunspider - 1.0 Total Score *
68.1 ms (1%)
Power Consumption - Prime95 V28,10 Stress Power Consumption (external Monitor) ultra *
100%
1 8400 +
115 Watt (31%)
Power Consumption - Cinebench R15 Multi Power Consumption (external Monitor) ultra *
100%
1 8400 +
97 Watt (26%)

Average Benchmarks Intel Core i5-8600K → 100%

Average Benchmarks Intel Core i5-8400 → 97%

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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)