Intel Core i5-11600K vs Intel Core i5-8400
48Single-core31.1
39.1Multi-core28.6
39.8Gamingspec-based27.2
15 spec wins — Intel Core i5-11600K2 spec wins — Intel Core i5-8400
InnoReviews verdict
Intel Core i5-11600K wins this desktop processor face-off, 42 to 29, pulling ahead mainly in single-core (+17) and multi-core (+11). 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 i5-11600K
- Stronger single-core score: 48 vs 31
- Stronger multi-core score: 39 vs 29
- 115% higher PassMark: 19,800 vs 9,200
- 100% higher threads: 12 vs 6
- 100% higher L2 cache: 3 MB vs 2 MB
Reasons to pick the Intel Core i5-8400
- 48% lower Base TDP: 65 W vs 125 W
- Has Cooler included — the other doesn't
- Lower launch price: $182 vs $262
General
| Spec | Intel Core i5-11600K | Intel Core i5-8400 |
|---|---|---|
| Announced | 2021 | 2017 |
| Socket | LGA1200 | LGA1151-v2 |
| Process | 14 nm | 14 nm |
| Base TDP | 125 W | 65 W+48% |
| Max turbo power | 251 W | — |
| Unlocked multiplier | Yes | No |
| Cooler included | No | Yes |
Cores & Clocks
| Spec | Intel Core i5-11600K | Intel Core i5-8400 |
|---|---|---|
| Cores | 6 | 6 |
| Performance cores | 6 | 6 |
| Efficiency cores | 0 | 0 |
| Threads | 12+100% | 6 |
| Base clock | 3.9 GHz+39% | 2.8 GHz |
| Boost clock | 4.9 GHz+23% | 4 GHz |
| L2 cache | 3 MB+100% | 2 MB |
| L3 cache | 12 MB+33% | 9 MB |
Integrated GPU
| Spec | Intel Core i5-11600K | Intel Core i5-8400 |
|---|---|---|
| iGPU | Intel UHD Graphics 750 | Intel UHD Graphics 630 |
| iGPU clock | 1,300 MHz | 1,050 MHz |
Memory
| Spec | Intel Core i5-11600K | Intel Core i5-8400 |
|---|---|---|
| Memory support | DDR4-3200 | DDR4-2666 |
| Max memory | 128 GB+100% | 64 GB |
| Memory channels | 2 | 2 |
Platform
| Spec | Intel Core i5-11600K | Intel Core i5-8400 |
|---|---|---|
| PCIe version | 4+33% | 3 |
| CPU PCIe lanes | 20+25% | 16 |
Benchmarks
| Spec | Intel Core i5-11600K | Intel Core i5-8400 |
|---|---|---|
| Geekbench 6 (single) | 1,870+36%Bottom 47% | 1,370Bottom 22% |
| Geekbench 6 (multi) | 7,100+45%Bottom 38% | 4,900Bottom 19% |
| Cinebench R23 (single) | 1,500+30%Bottom 45% | 1,150Bottom 22% |
| Cinebench R23 (multi) | 11,100+73%Bottom 42% | 6,400Bottom 19% |
| PassMark | 19,800+115%Bottom 36% | 9,200Bottom 14% |
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