Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Intel - Core Ultra 5 225 | AMD - Ryzen 9 9950X3D |
|---|---|---|
| L3 cache | 20 MB | 128 MB |
| Cinebench R23 (multi) | 18200 | 44100 |
| TDP | 65 W | 170 W |
| Cores | 10 | 16 |
| Boost clock | 4.9 GHz | 5.7 GHz |
Between the Core Ultra 5 225 and Ryzen 9 9950X3D, the Core Ultra 5 225 comes out ahead in tdp, while the Ryzen 9 9950X3D wins on l3 cache / cinebench r23 (multi). Overall, the Core Ultra 5 225 scores 47.8 and the Ryzen 9 9950X3D scores 62.9 on our Mars Score.
Which should you buy?
The Ryzen 9 9950X3D is the clear pick on raw spec strength, leading by 15.1 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the Core Ultra 5 225 if you care most about tdp. The biggest gaps in its favor are tdp. The single most decisive one: TDP — 105.00 W less. 65 vs 170.
Pick the Ryzen 9 9950X3D if you push the hardware — gaming, on-device AI, heavy multitasking — and the extra compute headroom is worth the trade-offs. Its strongest claims are l3 cache, cinebench r23 (multi), cores, among others. The single most decisive one: L3 cache — 540.00% more. 128 MB vs 20 MB.
There are no meaningful ties on the headline specs — every popular-comparison metric has a winner.
Bottom line: the Ryzen 9 9950X3D 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 Ultra 5 225 or AMD - Ryzen 9 9950X3D?
AMD - Ryzen 9 9950X3D leads the current Mars Score by 15.1 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 Ultra 5 225 if…
Intel - Core Ultra 5 225 has the measurable edge on tdp w.
Choose AMD - Ryzen 9 9950X3D if…
AMD - Ryzen 9 9950X3D has the measurable edge on cache l3 mb, cinebench r23 multi, core count.
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 Ultra 5 225 wins
- ▲TDP — 105.00 W less. 65 vs 170.
Why AMD - Ryzen 9 9950X3D wins
- ▲L3 cache — 540.00% more. 128 MB vs 20 MB.
- ▲Cinebench R23 (multi) — 142.31% more. 44100 vs 18200.
- ▲Cores — 60.00% more. 16 vs 10.
- ▲Boost clock — 16.33% more. 5.7 GHz vs 4.9 GHz.
Spec comparison
Cores
| Spec | Intel - Core Ultra 5 225 | AMD - Ryzen 9 9950X3D |
|---|---|---|
| Coresⓘ | 10 | 16lead |
| Threadsⓘ | 10 | 32lead |
| Base clockⓘ | 3.3 GHz | 4.3 GHzlead |
| Boost clockⓘ | 4.9 GHz | 5.7 GHzlead |
| L3 cacheⓘ | 20 MB | 128 MBlead |
Platform
| Spec | Intel - Core Ultra 5 225 | AMD - Ryzen 9 9950X3D |
|---|---|---|
| Socketⓘ | LGA1851 | AM5 |
| TDPⓘ | 65 Wlead | 170 W |
| Integrated graphicsⓘ | true | true |
| DDR5ⓘ | true | true |
Benchmarks
| Spec | Intel - Core Ultra 5 225 | AMD - Ryzen 9 9950X3D |
|---|---|---|
| Cinebench R23 (multi)ⓘ | 18200 | 44100lead |
| Cinebench R23 (single)ⓘ | 1980 | 2280lead |