Intel Core i7-7700K vs Intel Core i5-8400
Our index puts the Intel Core i5-8400 roughly 7% ahead of the Intel Core i7-7700K. This is an estimate for ranking, not a measured benchmark, and the gap varies considerably by title and by resolution.
| Specification | Intel Core i7-7700K | Intel Core i5-8400 |
|---|---|---|
| Manufacturer | Intel | Intel |
| Generation | 7th Gen (Kaby Lake) | 8th Gen (Coffee Lake) |
| Multi-thread index | 56 | 60 (better) |
| Single-thread index | 84 (better) | 81 |
| Cores | 4 | 6 (better) |
| Threads | 8 (better) | 6 |
| Base clock | 4.2 GHz (better) | 2.8 GHz |
| Boost clock | 4.5 GHz (better) | 4.0 GHz |
| Socket | LGA1151 | LGA1151 |
| TDP | 91 W | 65 W (better) |
| 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.