i5-9600K vs i9-11900K
Full specification comparison between the Intel Core i5-9600K (2018) and the Intel Core i9-11900K (2021).
i5-9600K
Intel Entry-level
- ✓ Lower power draw (95 W vs 125 W)
- ✓ Cheaper at launch ($262 vs $539)
- ✓ Better performance per dollar
i9-11900K
Intel Entry-level
- ✓ ~25% faster on average
- ✓ More cores (8 vs 6)
- ✓ Larger L3 cache (16 MB vs 9 MB)
- ✓ Higher boost clock (5.3 vs 4.6 GHz)
- ✓ Newer (2021 vs 2018)
Verdict: The i9-11900K is roughly 25% faster than the i5-9600K on average — a clear, noticeable performance advantage.
Note they use different platforms (LGA1200 vs LGA1151), so this is a motherboard decision too, not just a CPU swap.
At launch pricing, the i5-9600K offers more performance per dollar, and the i5-9600K 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 | i5-9600K | i9-11900K |
|---|---|---|
| Family | Coffee Lake Refresh | Rocket Lake |
| Socket | LGA1151 | LGA1200 |
| Release year | 2018 | 2021 |
| Est. gaming perf. | ||
| Est. multi-core perf. | ||
| Est. single-core perf. | ||
| Cores | ||
| Threads | ||
| Max boost clock | ||
| L3 cache | ||
| TDP (base) | ||
| Integrated graphics | UHD 630 | UHD 750 |
| Launch MSRP |
Green bars mark the better value in each row (for power and price, lower wins).
Frequently asked questions
Is the i9-11900K better than the i5-9600K?
Yes — based on aggregated benchmark data, the i9-11900K is about 25% faster than the i5-9600K on average.
How much faster is the i9-11900K than the i5-9600K?
Roughly 25% on average in gaming workloads. The gap varies by title, resolution and settings.
Which processor is better value?
Comparing launch prices, the i5-9600K delivers more performance per dollar. Check current street prices, as market pricing often shifts the value equation.