How do the scores compare?

Intel Core i5-10400 scores 32.6/100 overall; Intel Core i7-6700K scores 27.8/100. Intel Core i5-10400 wins 14 individual spec rows, Intel Core i7-6700K wins 3.

What are the main differences between the Intel Core i5-10400 and the Intel Core i7-6700K?

Intel Core i5-10400 advantages: Stronger multi-core score: 32 vs 27; 100% higher Max memory: 128 GB vs 64 GB; 60% higher Cinebench R23 (multi): 8,000 vs 5,000; 50% higher cores: 6 vs 4; 50% higher Performance cores: 6 vs 4; Lower launch price: $182 vs $339. Intel Core i7-6700K advantages: 38% higher Base clock: 4 GHz vs 2.9 GHz; Has Unlocked multiplier — the other doesn't.

Which is cheaper: Intel Core i5-10400 or Intel Core i7-6700K?

Intel Core i5-10400 launched cheaper at $182, versus $339 for the Intel Core i7-6700K.

Intel Core i5-10400 vs Intel Core i7-6700K

WINNER

Intel

Intel Core i5-10400

$182

Intel

Intel Core i7-6700K

$339

30.4Single-core30.7

32.2Multi-core27

36Gamingspec-based25.6

14 spec wins — Intel Core i5-104003 spec wins — Intel Core i7-6700K

InnoReviews verdict

Intel Core i5-10400 wins this desktop processor face-off, 32.6 to 27.8, pulling ahead mainly in multi-core (+5). Intel Core i7-6700K 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

Stronger multi-core score: 32 vs 27
100% higher Max memory: 128 GB vs 64 GB
60% higher Cinebench R23 (multi): 8,000 vs 5,000
50% higher cores: 6 vs 4
50% higher Performance cores: 6 vs 4
Lower launch price: $182 vs $339

Reasons to pick the Intel Core i7-6700K

38% higher Base clock: 4 GHz vs 2.9 GHz
Has Unlocked multiplier — the other doesn't

General

General comparison: Intel Core i5-10400 versus Intel Core i7-6700K
Spec	Intel Core i5-10400	Intel Core i7-6700K
Announced	2020	2015
Socket	LGA1200	LGA1151
Process	14 nm	14 nm
Base TDP	65 W+29%	91 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 i7-6700K
Spec	Intel Core i5-10400	Intel Core i7-6700K
Cores	6+50%	4
Performance cores	6+50%	4
Efficiency cores	0	0
Threads	12+50%	8
Base clock	2.9 GHz	4 GHz+38%
Boost clock	4.3 GHz+2%	4.2 GHz
L2 cache	2 MB+50%	1 MB
L3 cache	12 MB+50%	8 MB

Integrated GPU

Integrated GPU comparison: Intel Core i5-10400 versus Intel Core i7-6700K
Spec	Intel Core i5-10400	Intel Core i7-6700K
iGPU	Intel UHD Graphics 630	Intel HD Graphics 530
iGPU clock	1,100 MHz	1,150 MHz

Memory

Memory comparison: Intel Core i5-10400 versus Intel Core i7-6700K
Spec	Intel Core i5-10400	Intel Core i7-6700K
Memory support	DDR4-2666	DDR4-2133 / DDR3L-1600
Max memory	128 GB+100%	64 GB
Memory channels	2	2

Platform

Platform comparison: Intel Core i5-10400 versus Intel Core i7-6700K
Spec	Intel Core i5-10400	Intel Core i7-6700K
PCIe version	3	3
CPU PCIe lanes	16	16

Benchmarks

Benchmarks comparison: Intel Core i5-10400 versus Intel Core i7-6700K
Spec	Intel Core i5-10400	Intel Core i7-6700K
Geekbench 6 (single)	1,390Bottom 23%	1,420+2%Bottom 25%
Geekbench 6 (multi)	5,800+25%Bottom 27%	4,650Bottom 18%
Cinebench R23 (single)	1,100+1%Bottom 16%	1,090Bottom 15%
Cinebench R23 (multi)	8,000+60%Bottom 25%	5,000Bottom 14%
PassMark	12,600+42%Bottom 19%	8,900Bottom 13%

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