Intel Core i5-12600K vs Intel Core i5-8400
65.2Single-core31.1
50.8Multi-core28.6
52.1Gamingspec-based27.2
16 spec wins — Intel Core i5-12600K2 spec wins — Intel Core i5-8400
InnoReviews verdict
Intel Core i5-12600K wins this desktop processor face-off, 55.4 to 29, pulling ahead mainly in single-core (+34) and multi-core (+22). 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 i5-12600K
- Stronger single-core score: 65 vs 31
- Stronger multi-core score: 51 vs 29
- 533% higher L2 cache: 10 MB vs 2 MB
- 199% higher PassMark: 27,501 vs 9,200
- 167% higher threads: 16 vs 6
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 $318
General
| Spec | Intel Core i5-12600K | Intel Core i5-8400 |
|---|---|---|
| Announced | 2021 | 2017 |
| Socket | LGA1700 | LGA1151-v2 |
| Process | 10 nm+29% | 14 nm |
| Base TDP | 125 W | 65 W+48% |
| Max turbo power | 150 W | — |
| Unlocked multiplier | Yes | No |
| Cooler included | No | Yes |
Cores & Clocks
| Spec | Intel Core i5-12600K | Intel Core i5-8400 |
|---|---|---|
| Cores | 10+67% | 6 |
| Performance cores | 6 | 6 |
| Efficiency cores | 4 | 0 |
| Threads | 16+167% | 6 |
| Base clock | 3.7 GHz+32% | 2.8 GHz |
| Boost clock | 4.9 GHz+23% | 4 GHz |
| L2 cache | 10 MB+533% | 2 MB |
| L3 cache | 20 MB+122% | 9 MB |
Integrated GPU
| Spec | Intel Core i5-12600K | Intel Core i5-8400 |
|---|---|---|
| iGPU | Intel UHD Graphics 770 | Intel UHD Graphics 630 |
| iGPU clock | 1,450 MHz | 1,050 MHz |
Memory
| Spec | Intel Core i5-12600K | Intel Core i5-8400 |
|---|---|---|
| Memory support | DDR5-4800 / DDR4-3200 | DDR4-2666 |
| Max memory | 128 GB+100% | 64 GB |
| Memory channels | 2 | 2 |
Platform
| Spec | Intel Core i5-12600K | Intel Core i5-8400 |
|---|---|---|
| PCIe version | 5+67% | 3 |
| CPU PCIe lanes | 20+25% | 16 |
Benchmarks
| Spec | Intel Core i5-12600K | Intel Core i5-8400 |
|---|---|---|
| Geekbench 6 (single) | — | 1,370Bottom 22% |
| Geekbench 6 (multi) | — | 4,900Bottom 20% |
| Cinebench R23 (single) | 1,809+57%Top 38% | 1,150Bottom 23% |
| Cinebench R23 (multi) | 16,878+164%Top 37% | 6,400Bottom 19% |
| PassMark | 27,501+199%Top 47% | 9,200Bottom 14% |
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