How do the scores compare?

Intel Core i5-10400 scores 32.6/100 overall; Intel Core i7-8700K scores 36.4/100. Intel Core i5-10400 wins 4 individual spec rows, Intel Core i7-8700K wins 9.

What are the main differences between the Intel Core i5-10400 and the Intel Core i7-8700K?

Intel Core i5-10400 advantages: 100% higher Max memory: 128 GB vs 64 GB; 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 30; 28% higher Base clock: 3.7 GHz vs 2.9 GHz; 17% higher Geekbench 6 (multi): 6,800 vs 5,800; 15% higher Cinebench R23 (single): 1,270 vs 1,100; 15% higher Cinebench R23 (multi): 9,200 vs 8,000.

Which is cheaper: Intel Core i5-10400 or Intel Core i7-8700K?

Intel Core i5-10400 launched cheaper at $182, versus $359 for the Intel Core i7-8700K.

Intel Core i5-10400 vs Intel Core i7-8700K

Intel

Intel Core i5-10400

$182

WINNER

Intel

Intel Core i7-8700K

$359

30.4Single-core37.3

32.2Multi-core34.7

36Gaming38.5

4 spec wins — Intel Core i5-104009 spec wins — Intel Core i7-8700K

InnoReviews verdict

Intel Core i7-8700K wins this desktop processor face-off, 36.4 to 32.6, pulling ahead mainly in Single-core (+7) and Multi-core (+3). Intel Core i5-10400 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 i5-10400

100% higher Max memory: 128 GB vs 64 GB
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 30
28% higher Base clock: 3.7 GHz vs 2.9 GHz
17% higher Geekbench 6 (multi): 6,800 vs 5,800
15% higher Cinebench R23 (single): 1,270 vs 1,100
15% higher Cinebench R23 (multi): 9,200 vs 8,000

General

General comparison: Intel Core i5-10400 versus Intel Core i7-8700K
Spec	Intel Core i5-10400	Intel Core i7-8700K
Announced	2020	2017
Socket	LGA1200	LGA1151-v2
Process	14 nm	14 nm
Base TDP	65 W+32%	95 W
Max turbo power	134 W	—
Unlocked multiplier	No	Yes
Cooler included	Yes	No

Cores & Clocks

Cores & Clocks comparison: Intel Core i5-10400 versus Intel Core i7-8700K
Spec	Intel Core i5-10400	Intel Core i7-8700K
Cores	6	6
Performance cores	6	6
Efficiency cores	0	0
Threads	12	12
Base clock	2.9 GHz	3.7 GHz+28%
Boost clock	4.3 GHz	4.7 GHz+9%
L2 cache	2 MB	2 MB
L3 cache	12 MB	12 MB

Integrated GPU

Integrated GPU comparison: Intel Core i5-10400 versus Intel Core i7-8700K
Spec	Intel Core i5-10400	Intel Core i7-8700K
iGPU	Intel UHD Graphics 630	Intel UHD Graphics 630
iGPU clock	1,100 MHz	1,200 MHz+9%

Memory

Memory comparison: Intel Core i5-10400 versus Intel Core i7-8700K
Spec	Intel Core i5-10400	Intel Core i7-8700K
Memory support	DDR4-2666	DDR4-2666
Max memory	128 GB+100%	64 GB
Memory channels	2	2

Platform

Platform comparison: Intel Core i5-10400 versus Intel Core i7-8700K
Spec	Intel Core i5-10400	Intel Core i7-8700K
PCIe version	3	3
CPU PCIe lanes	16	16

Benchmarks

Benchmarks comparison: Intel Core i5-10400 versus Intel Core i7-8700K
Spec	Intel Core i5-10400	Intel Core i7-8700K
Geekbench 6 (single)	1,390Top 73%	1,560+12%Top 58%
Geekbench 6 (multi)	5,800Top 70%	6,800+17%Top 59%
Cinebench R23 (single)	1,100Top 80%	1,270+15%Top 63%
Cinebench R23 (multi)	8,000Top 71%	9,200+15%Top 61%
PassMark	12,600Top 73%	13,900+10%Top 68%

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