Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Apple - M4 Ultra | AMD - Ryzen 7 7800X3D |
|---|---|---|
| Cores | 32 | 8 |
| Cinebench R23 (multi) | 52600 | 18000 |
| L3 cache | 64 MB | 96 MB |
| Boost clock | 4.5 GHz | 5.0 GHz |
Between the M4 Ultra and Ryzen 7 7800X3D, the M4 Ultra comes out ahead in cores / cinebench r23 (multi), while the Ryzen 7 7800X3D wins on l3 cache / boost clock. Overall, the M4 Ultra scores 63.1 and the Ryzen 7 7800X3D scores 49.8 on our Mars Score.
Which should you buy?
The M4 Ultra is the clear pick on raw spec strength, leading by 13.3 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 M4 Ultra 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, cinebench r23 (multi). The single most decisive one: Cores — 300.00% more. 32 vs 8.
Pick the Ryzen 7 7800X3D if you care most about l3 cache / boost clock. Its strongest claims are l3 cache, boost clock. The single most decisive one: L3 cache — 50.00% more. 96 MB vs 64 MB.
Both ship with comparable tdp, so those specs do not separate the two — focus on the differences below.
Bottom line: the M4 Ultra 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: Apple - M4 Ultra or AMD - Ryzen 7 7800X3D?
Apple - M4 Ultra leads the current Mars Score by 13.3 points.The more useful decision is the trade-off behind that result: compare cores, boost clock against the way you will actually use the product.
Choose Apple - M4 Ultra if…
Apple - M4 Ultra has the measurable edge on core count, cinebench r23 multi.
Choose AMD - Ryzen 7 7800X3D if…
AMD - Ryzen 7 7800X3D has the measurable edge on cache l3 mb, boost clock ghz.
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 Apple - M4 Ultra wins
- ▲Cores — 300.00% more. 32 vs 8.
- ▲Cinebench R23 (multi) — 192.22% more. 52600 vs 18000.
Why AMD - Ryzen 7 7800X3D wins
- ▲L3 cache — 50.00% more. 96 MB vs 64 MB.
- ▲Boost clock — 11.11% more. 5.0 GHz vs 4.5 GHz.
Spec comparison
Cores
| Spec | Apple - M4 Ultra | AMD - Ryzen 7 7800X3D |
|---|---|---|
| Coresⓘ | 32lead | 8 |
| Threadsⓘ | 32lead | 16 |
| Base clockⓘ | 0 GHz | 4.2 GHzlead |
| Boost clockⓘ | 4.5 GHz | 5.0 GHzlead |
| L3 cacheⓘ | 64 MB | 96 MBlead |
Platform
| Spec | Apple - M4 Ultra | AMD - Ryzen 7 7800X3D |
|---|---|---|
| Socketⓘ | Soldered | AM5 |
| TDPⓘ | 120 W | 120 W |
| Integrated graphicsⓘ | true | true |
| DDR5ⓘ | true | true |
Benchmarks
| Spec | Apple - M4 Ultra | AMD - Ryzen 7 7800X3D |
|---|---|---|
| Cinebench R23 (multi)ⓘ | 52600lead | 18000 |
| Cinebench R23 (single)ⓘ | 2290lead | 1880 |