Intel Core i5-8400 vs Intel Core i7-6700K
31.1Single-core30.7
28.6Multi-core27
27.2Gamingspec-based25.6
11 spec wins — Intel Core i5-84005 spec wins — Intel Core i7-6700K
InnoReviews verdict
This one is close to a dead heat: Intel Core i5-8400 scores 29 against 27.8 for Intel Core i7-6700K. Pick by the categories that matter to you — Intel Core i5-8400 edges ahead in multi-core and single-core, or by price.
Which would you pick?
Key differences
Reasons to pick the Intel Core i5-8400
- 50% higher cores: 6 vs 4
- 50% higher Performance cores: 6 vs 4
- 50% higher L2 cache: 2 MB vs 1 MB
- 29% lower Base TDP: 65 W vs 91 W
- 28% higher Cinebench R23 (multi): 6,400 vs 5,000
- Lower launch price: $182 vs $339
Reasons to pick the Intel Core i7-6700K
- 43% higher Base clock: 4 GHz vs 2.8 GHz
- 33% higher threads: 8 vs 6
- Has Unlocked multiplier — the other doesn't
General
| Spec | Intel Core i5-8400 | Intel Core i7-6700K |
|---|---|---|
| Announced | 2017 | 2015 |
| Socket | LGA1151-v2 | LGA1151 |
| Process | 14 nm | 14 nm |
| Base TDP | 65 W+29% | 91 W |
| Unlocked multiplier | No | Yes |
| Cooler included | Yes | No |
Cores & Clocks
| Spec | Intel Core i5-8400 | Intel Core i7-6700K |
|---|---|---|
| Cores | 6+50% | 4 |
| Performance cores | 6+50% | 4 |
| Efficiency cores | 0 | 0 |
| Threads | 6 | 8+33% |
| Base clock | 2.8 GHz | 4 GHz+43% |
| Boost clock | 4 GHz | 4.2 GHz+5% |
| L2 cache | 2 MB+50% | 1 MB |
| L3 cache | 9 MB+13% | 8 MB |
Integrated GPU
| Spec | Intel Core i5-8400 | Intel Core i7-6700K |
|---|---|---|
| iGPU | Intel UHD Graphics 630 | Intel HD Graphics 530 |
| iGPU clock | 1,050 MHz | 1,150 MHz |
Memory
| Spec | Intel Core i5-8400 | Intel Core i7-6700K |
|---|---|---|
| Memory support | DDR4-2666 | DDR4-2133 / DDR3L-1600 |
| Max memory | 64 GB | 64 GB |
| Memory channels | 2 | 2 |
Platform
| Spec | Intel Core i5-8400 | Intel Core i7-6700K |
|---|---|---|
| PCIe version | 3 | 3 |
| CPU PCIe lanes | 16 | 16 |
Benchmarks
| Spec | Intel Core i5-8400 | Intel Core i7-6700K |
|---|---|---|
| Geekbench 6 (single) | 1,370Bottom 22% | 1,420+4%Bottom 25% |
| Geekbench 6 (multi) | 4,900+5%Bottom 19% | 4,650Bottom 18% |
| Cinebench R23 (single) | 1,150+6%Bottom 22% | 1,090Bottom 15% |
| Cinebench R23 (multi) | 6,400+28%Bottom 19% | 5,000Bottom 14% |
| PassMark | 9,200+3%Bottom 14% | 8,900Bottom 13% |
Related comparisons
Intel Core i5-8400vs Intel Core i7-5820KVSIntel Core i5-8400vs Intel Core i3-10100FVSIntel Core i5-8400vs Intel Core i5-9400FVSIntel Core i5-8400vs Intel Core i7-5930KVSIntel Core i7-6700Kvs Intel Core i7-4790KVSIntel Core i7-6700Kvs Intel Core i5-9400FVSIntel Core i7-6700Kvs Intel Core i3-10100FVSIntel Core i7-6700Kvs Intel Core i7-5820KVS