Intel Core i5-8400 vs Intel Core i7-5820K
31.1Single-core20.7
28.6Multi-core29
27.2Gamingspec-based37.1
8 spec wins — Intel Core i5-84008 spec wins — Intel Core i7-5820K
InnoReviews verdict
This one is close to a dead heat: Intel Core i5-8400 scores 29 against 28.5 for Intel Core i7-5820K. Pick by the categories that matter to you — Intel Core i5-8400 edges ahead in single-core, or by price.
Which would you pick?
Key differences
Reasons to pick the Intel Core i5-8400
- Stronger single-core score: 31 vs 21
- 54% lower Base TDP: 65 W vs 140 W
- 36% lower process: 14 nm vs 22 nm
- 32% higher Geekbench 6 (single): 1,370 vs 1,040
- 29% higher Cinebench R23 (single): 1,150 vs 890
- Lower launch price: $182 vs $389
Reasons to pick the Intel Core i7-5820K
- 100% higher threads: 12 vs 6
- 100% higher Memory channels: 4 vs 2
- 75% higher CPU PCIe lanes: 28 vs 16
- 67% higher L3 cache: 15 MB vs 9 MB
- 18% higher Base clock: 3.3 GHz vs 2.8 GHz
General
| Spec | Intel Core i5-8400 | Intel Core i7-5820K |
|---|---|---|
| Announced | 2017 | 2014 |
| Socket | LGA1151-v2 | LGA2011-v3 |
| Process | 14 nm+36% | 22 nm |
| Base TDP | 65 W+54% | 140 W |
| Unlocked multiplier | No | Yes |
| Cooler included | Yes | No |
Cores & Clocks
| Spec | Intel Core i5-8400 | Intel Core i7-5820K |
|---|---|---|
| Cores | 6 | 6 |
| Performance cores | 6 | 6 |
| Efficiency cores | 0 | 0 |
| Threads | 6 | 12+100% |
| Base clock | 2.8 GHz | 3.3 GHz+18% |
| Boost clock | 4 GHz+11% | 3.6 GHz |
| L2 cache | 2 MB | 2 MB |
| L3 cache | 9 MB | 15 MB+67% |
Integrated GPU
| Spec | Intel Core i5-8400 | Intel Core i7-5820K |
|---|---|---|
| iGPU | Intel UHD Graphics 630 | — |
| iGPU clock | 1,050 MHz | — |
Memory
| Spec | Intel Core i5-8400 | Intel Core i7-5820K |
|---|---|---|
| Memory support | DDR4-2666 | DDR4-2133 |
| Max memory | 64 GB | 64 GB |
| Memory channels | 2 | 4+100% |
Platform
| Spec | Intel Core i5-8400 | Intel Core i7-5820K |
|---|---|---|
| PCIe version | 3 | 3 |
| CPU PCIe lanes | 16 | 28+75% |
Benchmarks
| Spec | Intel Core i5-8400 | Intel Core i7-5820K |
|---|---|---|
| Geekbench 6 (single) | 1,370+32%Bottom 24% | 1,040Bottom 5% |
| Geekbench 6 (multi) | 4,900Bottom 18% | 5,100+4%Bottom 23% |
| Cinebench R23 (single) | 1,150+29%Bottom 21% | 890Bottom 4% |
| Cinebench R23 (multi) | 6,400Bottom 17% | 6,400Bottom 17% |
| PassMark | 9,235Bottom 14% | 9,831+6%Bottom 17% |
| PassMark (single thread) | 2,364+19%Bottom 14% | 1,992Bottom 4% |
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