How do the scores compare?

Intel Core i5-8400 scores 29/100 overall; Intel Core i7-8700K scores 36.4/100. Intel Core i5-8400 wins 2 individual spec rows, Intel Core i7-8700K wins 10.

What are the main differences between the Intel Core i5-8400 and the Intel Core i7-8700K?

Intel Core i5-8400 advantages: 32% lower Base TDP: 65 W vs 95 W; Has Cooler included — the other doesn't; Lower launch price: $182 vs $359. Intel Core i7-8700K advantages: Stronger single-core score: 37 vs 31; Stronger multi-core score: 35 vs 29; 100% higher threads: 12 vs 6; 51% higher PassMark: 13,900 vs 9,200; 44% higher Cinebench R23 (multi): 9,200 vs 6,400.

Which is cheaper: Intel Core i5-8400 or Intel Core i7-8700K?

Intel Core i5-8400 launched cheaper at $182, versus $359 for the Intel Core i7-8700K.

Intel Core i5-8400 vs Intel Core i7-8700K

Intel

Intel Core i5-8400

$182

WINNER

Intel

Intel Core i7-8700K

$359

31.1Single-core37.3

28.6Multi-core34.7

27.2Gamingspec-based38.5

2 spec wins — Intel Core i5-840010 spec wins — Intel Core i7-8700K

InnoReviews verdict

Intel Core i7-8700K wins this desktop processor face-off, 36.4 to 29, pulling ahead mainly in single-core (+6) and multi-core (+6). Intel Core i5-8400 still makes sense if its price or standout specs fit your needs better.

Which would you pick?

Key differences

Reasons to pick the Intel Core i5-8400

32% lower Base TDP: 65 W vs 95 W
Has Cooler included — the other doesn't
Lower launch price: $182 vs $359

Reasons to pick the Intel Core i7-8700K

Stronger single-core score: 37 vs 31
Stronger multi-core score: 35 vs 29
100% higher threads: 12 vs 6
51% higher PassMark: 13,900 vs 9,200
44% higher Cinebench R23 (multi): 9,200 vs 6,400

General

General comparison: Intel Core i5-8400 versus Intel Core i7-8700K
Spec	Intel Core i5-8400	Intel Core i7-8700K
Announced	2017	2017
Socket	LGA1151-v2	LGA1151-v2
Process	14 nm	14 nm
Base TDP	65 W+32%	95 W
Unlocked multiplier	No	Yes
Cooler included	Yes	No

Cores & Clocks

Cores & Clocks comparison: Intel Core i5-8400 versus Intel Core i7-8700K
Spec	Intel Core i5-8400	Intel Core i7-8700K
Cores	6	6
Performance cores	6	6
Efficiency cores	0	0
Threads	6	12+100%
Base clock	2.8 GHz	3.7 GHz+32%
Boost clock	4 GHz	4.7 GHz+18%
L2 cache	2 MB	2 MB
L3 cache	9 MB	12 MB+33%

Integrated GPU

Integrated GPU comparison: Intel Core i5-8400 versus Intel Core i7-8700K
Spec	Intel Core i5-8400	Intel Core i7-8700K
iGPU	Intel UHD Graphics 630	Intel UHD Graphics 630
iGPU clock	1,050 MHz	1,200 MHz

Memory

Memory comparison: Intel Core i5-8400 versus Intel Core i7-8700K
Spec	Intel Core i5-8400	Intel Core i7-8700K
Memory support	DDR4-2666	DDR4-2666
Max memory	64 GB	64 GB
Memory channels	2	2

Platform

Platform comparison: Intel Core i5-8400 versus Intel Core i7-8700K
Spec	Intel Core i5-8400	Intel Core i7-8700K
PCIe version	3	3
CPU PCIe lanes	16	16

Benchmarks

Benchmarks comparison: Intel Core i5-8400 versus Intel Core i7-8700K
Spec	Intel Core i5-8400	Intel Core i7-8700K
Geekbench 6 (single)	1,370Bottom 22%	1,560+14%Bottom 33%
Geekbench 6 (multi)	4,900Bottom 19%	6,800+39%Bottom 35%
Cinebench R23 (single)	1,150Bottom 22%	1,270+10%Bottom 29%
Cinebench R23 (multi)	6,400Bottom 19%	9,200+44%Bottom 32%
PassMark	9,200Bottom 14%	13,900+51%Bottom 23%

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