Processors/Comparison
10 specifications
Intel Core Ultra 5 245KF vs AMD Ryzen 9 3900X
On paper, the Intel Core Ultra 5 245KF has more cores (14 against 12), the Intel Core Ultra 5 245KF boosts higher, and the AMD Ryzen 9 3900X carries more L3 cache. Specifications describe what each chip is designed to do; how much of that either one holds under continuous load is a separate question.
Intel Core Ultra 5 245KF
Intel · Arrow Lake-S (Core Ultra 200S) · Desktop
AMD Ryzen 9 3900X
AMD · Ryzen 3000 (Matisse, Zen 2) · Desktop
Cores and clocks
Cache and power
Platform
A check marks the higher figure only on rows where higher is unambiguously better. Rows without one are not ties; they are specifications where “better” has no meaning.
More comparisons
- Intel Core Ultra 5 245KF vs Intel Core Ultra 5 245K
- Intel Core Ultra 5 245KF vs Intel Core i5-13600K
- Intel Core Ultra 5 245KF vs Intel Core Ultra 5 245
- Intel Core Ultra 5 245KF vs Intel Core i5-14600K
- Intel Core Ultra 5 245KF vs Intel Core i5-14600KF
- Intel Core Ultra 5 245KF vs AMD Ryzen 9 5900X
- AMD Ryzen 9 3900X vs Intel Core i5-14500
- AMD Ryzen 9 3900X vs AMD Ryzen 9 5900X
- AMD Ryzen 9 3900X vs Intel Core i5-13600K
- AMD Ryzen 9 3900X vs Intel Core Ultra 5 245
- AMD Ryzen 9 3900X vs Intel Core Ultra 5 245K
Every figure on this table is a design target. None of it is a measurement.
Nothing above describes how a processor behaves twenty minutes into a sustained workload, which is where two chips with nearly identical specifications routinely diverge. A boost clock is a ceiling the vendor permits, not a rate the chip sustains, and whether it holds depends on the cooling, the case, the power profile and the room. None of those appear on a specification sheet.
We deliberately do not reduce these figures to a single score. A composite invented from specifications would look authoritative and measure nothing, and choosing the weights would be choosing the winner.