i5-10400F vs i7-8700K
Full specification comparison between the Intel Core i5-10400F (2020) and the Intel Core i7-8700K (2017).
i5-10400F
Intel Entry-level
- ✓ ~8% faster on average
- ✓ Lower power draw (65 W vs 95 W)
- ✓ Cheaper at launch ($157 vs $359)
- ✓ Newer (2020 vs 2017)
- ✓ Better performance per dollar
i7-8700K
Intel Entry-level
- ✓ Higher boost clock (4.7 vs 4.3 GHz)
- ✓ Has integrated graphics
Verdict: The i5-10400F is around 8% faster than the i7-8700K on average — a modest edge you may notice in demanding titles, but not a generational leap.
For gaming the i5-10400F leads, but the i7-8700K pulls ahead in heavily multi-threaded work like rendering, compiling and video export thanks to its stronger multi-core throughput.
Note they use different platforms (LGA1200 vs LGA1151), so this is a motherboard decision too, not just a CPU swap.
At launch pricing, the i5-10400F offers more performance per dollar, and the i5-10400F is the more power-efficient chip.
Estimated performance
Estimated average 1080p gaming performance compiled from publicly available benchmark data. Individual games vary.
Specs side by side
| Specification | i5-10400F | i7-8700K |
|---|---|---|
| Family | Comet Lake | Coffee Lake |
| Socket | LGA1200 | LGA1151 |
| Release year | 2020 | 2017 |
| Est. gaming perf. | ||
| Est. multi-core perf. | ||
| Est. single-core perf. | ||
| Cores | ||
| Threads | ||
| Max boost clock | ||
| L3 cache | ||
| TDP (base) | ||
| Integrated graphics | None | UHD 630 |
| Launch MSRP |
Green bars mark the better value in each row (for power and price, lower wins).
Frequently asked questions
Is the i5-10400F better than the i7-8700K?
Yes — based on aggregated benchmark data, the i5-10400F is about 8% faster than the i7-8700K on average.
How much faster is the i5-10400F than the i7-8700K?
Roughly 8% on average in gaming workloads. The gap varies by title, resolution and settings.
Which processor is better value?
Comparing launch prices, the i5-10400F delivers more performance per dollar. Check current street prices, as market pricing often shifts the value equation.