Performance comparison: which is faster?
Core Ultra 9 285K (Intel, 2025) and Core Ultra 5 245KF (Intel, 2025) 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: Ultra 9 285K is about 73.3% faster
Both use the same LGA1851 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 | Ultra 9 285K | Ultra 5 245KF |
|---|---|---|
| Performance Score | 65,000 | 37,500 |
| Generation | Core Ultra | Core Ultra |
| Socket | LGA1851 | LGA1851 |
| Release Year | 2025 | 2025 |
| Type | Desktop | Desktop |
| Compatible GPU Example | GeForce RTX 4070 SUPER | GeForce RTX 3080 Ti |
| If You Want To... | Recommended |
|---|---|
| Prioritize maximum speed for heavy work or a high-end GPU | Ultra 9 285K |
| Upgrade while reusing the current motherboard | Either works (same LGA1851 socket) |
| Prioritize value and adequate performance | Ultra 5 245KF (the lower model is often sufficient) |
Ultra 9 285K is about 73.3% higher by score (Ultra 9 285K: 65000 points / Ultra 5 245KF: 37500 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 Core Ultra-generation CPUs.Both use the same LGA1851 socket, so they can be installed on the same motherboard.
Using our CPU:GPU = 0.9:1 guideline, GeForce RTX 4070 SUPER pairs well with Ultra 9 285K and GeForce RTX 3080 Ti pairs well with Ultra 5 245KF. If either GPU is too strong or too weak, one part holds the other back.
