Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Intel - Core i9-14900K | AMD - Ryzen 9 7900X |
|---|---|---|
| Cores | 24 | 12 |
| L3 cache | 36 MB | 64 MB |
| TDP | 125 W | 170 W |
| Cinebench R23 (multi) | 40400 | 29600 |
| Boost clock | 6.0 GHz | 5.6 GHz |
Between the Core i9-14900K and Ryzen 9 7900X, the Core i9-14900K comes out ahead in cores / tdp, while the Ryzen 9 7900X wins on l3 cache. Overall, the Core i9-14900K scores 61.1 and the Ryzen 9 7900X scores 55.6 on our Mars Score.
Which should you buy?
The Core i9-14900K edges ahead on the Mars Score (61.1 vs 55.6), but the 5.5-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Core i9-14900K if you push the hardware — gaming, on-device AI, heavy multitasking — and the extra compute headroom is worth the trade-offs. The biggest gaps in its favor are cores, tdp, cinebench r23 (multi), among others. The single most decisive one: Cores — 100.00% more. 24 vs 12.
Pick the Ryzen 9 7900X if you care most about l3 cache. Its strongest claims are l3 cache. The single most decisive one: L3 cache — 77.78% more. 64 MB vs 36 MB.
There are no meaningful ties on the headline specs — every popular-comparison metric has a winner.
Bottom line: the Core i9-14900K is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: Intel - Core i9-14900K or AMD - Ryzen 9 7900X?
Intel - Core i9-14900K leads the current Mars Score by 5.5 points.The more useful decision is the trade-off behind that result: compare cores, boost clock, tdp against the way you will actually use the product.
Choose Intel - Core i9-14900K if…
Intel - Core i9-14900K has the measurable edge on core count, tdp w, cinebench r23 multi.
Choose AMD - Ryzen 9 7900X if…
AMD - Ryzen 9 7900X has the measurable edge on cache l3 mb.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Intel - Core i9-14900K wins
- ▲Cores — 100.00% more. 24 vs 12.
- ▲TDP — 45.00 W less. 125 vs 170.
- ▲Cinebench R23 (multi) — 36.49% more. 40400 vs 29600.
- ▲Boost clock — 7.14% more. 6.0 GHz vs 5.6 GHz.
Why AMD - Ryzen 9 7900X wins
- ▲L3 cache — 77.78% more. 64 MB vs 36 MB.
Spec comparison
Cores
| Spec | Intel - Core i9-14900K | AMD - Ryzen 9 7900X |
|---|---|---|
| Coresⓘ | 24lead | 12 |
| Threadsⓘ | 32lead | 24 |
| Base clockⓘ | 3.2 GHz | 4.7 GHzlead |
| Boost clockⓘ | 6.0 GHzlead | 5.6 GHz |
| L3 cacheⓘ | 36 MB | 64 MBlead |
Platform
| Spec | Intel - Core i9-14900K | AMD - Ryzen 9 7900X |
|---|---|---|
| Socketⓘ | LGA1700 | AM5 |
| TDPⓘ | 125 Wlead | 170 W |
| Integrated graphicsⓘ | true | true |
| DDR5ⓘ | true | true |
Benchmarks
| Spec | Intel - Core i9-14900K | AMD - Ryzen 9 7900X |
|---|---|---|
| Cinebench R23 (multi)ⓘ | 40400lead | 29600 |
| Cinebench R23 (single)ⓘ | 2310lead | 2030 |