Intel Core i5-8400 vs Intel Core i7-8700K
Our index puts the Intel Core i7-8700K roughly 33% ahead of the Intel Core i5-8400. This is an estimate for ranking, not a measured benchmark, and the gap varies considerably by title and by resolution.
| Specification | Intel Core i5-8400 | Intel Core i7-8700K |
|---|---|---|
| Manufacturer | Intel | Intel |
| Generation | 8th Gen (Coffee Lake) | 8th Gen (Coffee Lake) |
| Multi-thread index | 60 | 80 (better) |
| Single-thread index | 81 | 89 (better) |
| Cores | 6 | 6 |
| Threads | 6 | 12 (better) |
| Base clock | 2.8 GHz | 3.7 GHz (better) |
| Boost clock | 4.0 GHz | 4.7 GHz (better) |
| Socket | LGA1151 | LGA1151 |
| TDP | 65 W (better) | 95 W |
| Release year | 2017 | 2017 |
| Integrated graphics | Yes | Yes |
Green marks the stronger figure for that row only — for power draw and PSU requirement, lower is treated as better. Performance indexes are CanMyPcPlay estimates; read how they are derived.
Which should you pick?
- Games follow single-thread. For gaming, the single-thread index matters more than core count.
- Creative work follows multi-thread. Rendering, compiling and encoding scale with cores.
- Sockets differ. Moving between platforms usually means a new motherboard and often new memory.