Between the M4 Max (16-core) and Ryzen 9 9900X, the M4 Max (16-core) comes out ahead in tdp and cores, while the Ryzen 9 9900X wins on l3 cache and boost clock. Overall, the M4 Max (16-core) scores 50.7 and the Ryzen 9 9900X scores 56.6 on our Mars Score.
Which should you buy?
The Ryzen 9 9900X edges ahead on the Mars Score (50.7 vs 56.6), but the 5.9-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the M4 Max (16-core) if you care most about tdp and cores. The biggest gaps in its favor are tdp, cores.
Pick the Ryzen 9 9900X 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, boost clock, cinebench r23 (multi).
There are no meaningful ties on the headline specs — every popular-comparison metric has a winner.
Bottom line: the Ryzen 9 9900X is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Apple - M4 Max (16-core) wins
- ▲TDP — 75.00 W less. 45 vs 120.
- ▲Cores — 16.67% more. 14 vs 12.
Why AMD - Ryzen 9 9900X wins
- ▲L3 cache — 128.57% more. 64 MB vs 28 MB.
- ▲Boost clock — 24.44% more. 5.6 GHz vs 4.5 GHz.
- ▲Cinebench R23 (multi) — 22.64% more. 32500 vs 26500.
Spec comparison
Cores
| Spec | Apple - M4 Max (16-core) | AMD - Ryzen 9 9900X |
|---|---|---|
| Coresⓘ | 14lead | 12 |
| Threadsⓘ | 14 | 24lead |
| Base clockⓘ | 0 GHz | 4.4 GHzlead |
| Boost clockⓘ | 4.5 GHz | 5.6 GHzlead |
| L3 cacheⓘ | 28 MB | 64 MBlead |
Platform
| Spec | Apple - M4 Max (16-core) | AMD - Ryzen 9 9900X |
|---|---|---|
| Socketⓘ | Soldered | AM5 |
| TDPⓘ | 45 Wlead | 120 W |
| Integrated graphicsⓘ | true | true |
| DDR5ⓘ | true | true |
Benchmarks
| Spec | Apple - M4 Max (16-core) | AMD - Ryzen 9 9900X |
|---|---|---|
| Cinebench R23 (multi)ⓘ | 26500 | 32500lead |
| Cinebench R23 (single)ⓘ | 2275lead | 2230 |
Frequently asked
Spec-level deep dives
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