Intel Core i5-8400 vs Intel Core i9-10900K
31.1Single-core41.9
28.6Multi-core48.2
27.2Gaming54.6
2 spec wins — Intel Core i5-840016 spec wins — Intel Core i9-10900K
InnoReviews verdict
Intel Core i9-10900K wins this desktop processor face-off, 47.9 to 29, pulling ahead mainly in gaming (+27) and Multi-core (+20). 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 i5-8400
- 48% lower Base TDP: 65 W vs 125 W
- Has Cooler included — the other doesn't
- Lower launch price: $182 vs $488
Reasons to pick the Intel Core i9-10900K
- Stronger Single-core score: 42 vs 31
- Stronger Multi-core score: 48 vs 29
- Stronger gaming score: 55 vs 27
- 233% higher threads: 20 vs 6
- 158% higher PassMark: 23,700 vs 9,200
General
| Spec | Intel Core i5-8400 | Intel Core i9-10900K |
|---|---|---|
| Announced | 2017 | 2020 |
| Socket | LGA1151-v2 | LGA1200 |
| Process | 14 nm | 14 nm |
| Base TDP | 65 W+48% | 125 W |
| Max turbo power | — | 250 W |
| Unlocked multiplier | No | Yes |
| Cooler included | Yes | No |
Cores & Clocks
| Spec | Intel Core i5-8400 | Intel Core i9-10900K |
|---|---|---|
| Cores | 6 | 10+67% |
| Performance cores | 6 | 10+67% |
| Efficiency cores | 0 | 0 |
| Threads | 6 | 20+233% |
| Base clock | 2.8 GHz | 3.7 GHz+32% |
| Boost clock | 4 GHz | 5.3 GHz+32% |
| L2 cache | 2 MB | 3 MB+67% |
| L3 cache | 9 MB | 20 MB+122% |
Integrated GPU
| Spec | Intel Core i5-8400 | Intel Core i9-10900K |
|---|---|---|
| iGPU | Intel UHD Graphics 630 | Intel UHD Graphics 630 |
| iGPU clock | 1,050 MHz | 1,200 MHz+14% |
Memory
| Spec | Intel Core i5-8400 | Intel Core i9-10900K |
|---|---|---|
| Memory support | DDR4-2666 | DDR4-2933 |
| Max memory | 64 GB | 128 GB+100% |
| Memory channels | 2 | 2 |
Platform
| Spec | Intel Core i5-8400 | Intel Core i9-10900K |
|---|---|---|
| PCIe version | 3 | 3 |
| CPU PCIe lanes | 16 | 16 |
Benchmarks
| Spec | Intel Core i5-8400 | Intel Core i9-10900K |
|---|---|---|
| Geekbench 6 (single) | 1,370Top 75% | 1,730+26%Top 50% |
| Geekbench 6 (multi) | 4,900Top 78% | 10,400+112%Top 38% |
| Cinebench R23 (single) | 1,150Top 75% | 1,340+17%Top 52% |
| Cinebench R23 (multi) | 6,400Top 77% | 16,300+155%Top 30% |
| PassMark | 9,200Top 80% | 23,700+158%Top 40% |
Related comparisons
Intel Core i5-8400vs Intel Core i7-5820KVSIntel Core i5-8400vs Intel Core i5-9400FVSIntel Core i5-8400vs Intel Core i7-5930KVSIntel Core i5-8400vs Intel Core i7-7700KVSIntel Core i9-10900Kvs AMD Ryzen 5 5600VSIntel Core i9-10900Kvs Intel Core i5-12400VSIntel Core i9-10900Kvs Intel Core i5-12400FVSIntel Core i9-10900Kvs Intel Core i7-11700KVS