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AMD - Ryzen 7 9800X3D vs AMD - Ryzen 9 9900X3D

Last updated · How Mars Score works
Ryzen 7 9800X3DAMDRENDER
Probe A
AMD
Ryzen 7 9800X3D
52.4/ 100D
Cores53· 40%
Benchmarks51· 40%
Platform—· 20%
Ryzen 9 9900X3DAMDRENDER
Probe B
AMD
Ryzen 9 9900X3D
58.1/ 100C
Cores57· 40%
Benchmarks59· 40%
Platform—· 20%
Quick verdict

Between the Ryzen 7 9800X3D and Ryzen 9 9900X3D, the Ryzen 7 9800X3D comes out ahead in several specs, while the Ryzen 9 9900X3D wins on cores and cinebench r23 (multi). Overall, the Ryzen 7 9800X3D scores 52.4 and the Ryzen 9 9900X3D scores 58.1 on our Mars Score.

Buying advice

Which should you buy?

The Ryzen 9 9900X3D edges ahead on the Mars Score (52.4 vs 58.1), but the 5.7-point gap is small enough that the right pick comes down to which spec advantages matter to you.

The Ryzen 7 9800X3D doesn't pull ahead on any single popular-comparison spec — its strengths sit in the spec table groups rather than the headline advantages.

Pick the Ryzen 9 9900X3D 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 cores, cinebench r23 (multi), l3 cache, among others.

Both ship with comparable tdp, so those specs don't separate the two — focus on the differences below.

Bottom line: the Ryzen 9 9900X3D is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.

Why AMD - Ryzen 7 9800X3D wins

  • No decisive advantages.

Why AMD - Ryzen 9 9900X3D wins

  • ▲Cores — 50.00% more. 12 vs 8.
  • ▲Cinebench R23 (multi) — 42.55% more. 33500 vs 23500.
  • ▲L3 cache — 33.33% more. 128 MB vs 96 MB.
  • ▲Boost clock — 5.77% more. 5.5 GHz vs 5.2 GHz.
Full readout

Spec comparison

Cores

SpecAMD - Ryzen 7 9800X3DAMD - Ryzen 9 9900X3D
Coresⓘ812lead
Threadsⓘ1624lead
Base clockⓘ4.7 GHzlead4.4 GHz
Boost clockⓘ5.2 GHz5.5 GHzlead
L3 cacheⓘ96 MB128 MBlead

Platform

SpecAMD - Ryzen 7 9800X3DAMD - Ryzen 9 9900X3D
SocketⓘAM5AM5
TDPⓘ120 W120 W
Integrated graphicsⓘtruetrue
DDR5ⓘtruetrue

Benchmarks

SpecAMD - Ryzen 7 9800X3DAMD - Ryzen 9 9900X3D
Cinebench R23 (multi)ⓘ2350033500lead
Cinebench R23 (single)ⓘ21502240lead
Drill down

Spec-level deep dives

Cores→Threads→Base clock→Boost clock→L3 cache→Socket→TDP→Integrated graphics→DDR5→Cinebench R23 (multi)→Cinebench R23 (single)→
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