Performance comparison: which is faster?
Core i9-11900K (Intel, 2021) and Core i9-11900KF (Intel, 2021) are compared here. Compare not only scores, but also whether the motherboard can be reused and which GPU class is balanced with each CPU.
Overall performance: i9-11900K is about 0.7% faster
Both use the same LGA1200 socket, so they can be installed on the same motherboard. For games, performance balance with the GPU (guideline CPU:GPU = 0.9:1) matters more than CPU speed alone.
Relative performance score (higher is faster). Actual speed varies by workload, cooling, and memory configuration.
| Item | i9-11900K | i9-11900KF |
|---|---|---|
| Performance Score | 28,000 | 27,800 |
| Generation | 11th Gen | 11th Gen |
| Socket | LGA1200 | LGA1200 |
| Release Year | 2021 | 2021 |
| Type | Desktop | Desktop |
| Compatible GPU Example | Radeon RX 7800 XT | Radeon RX 7800 XT |
| If You Want To... | Recommended |
|---|---|
| Prioritize maximum speed for heavy work or a high-end GPU | i9-11900K |
| Upgrade while reusing the current motherboard | Either works (same LGA1200 socket) |
| Prioritize value and adequate performance | i9-11900KF (the lower model is often sufficient) |
i9-11900K is about 0.7% higher by score (i9-11900K: 28000 points / i9-11900KF: 27800 points). For gaming, the GPU tier usually matters more than a few percent of CPU difference. For CPU-heavy work such as video editing and streaming, choose the faster CPU.
Both are 11th Gen-generation CPUs.Both use the same LGA1200 socket, so they can be installed on the same motherboard.
Using our CPU:GPU = 0.9:1 guideline, Radeon RX 7800 XT pairs well with i9-11900K and Radeon RX 7800 XT pairs well with i9-11900KF. If either GPU is too strong or too weak, one part holds the other back.
