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InnoReviews

AMD Ryzen 9 9900X3D vs AMD Ryzen 9 PRO 9945

WINNER
AMD Ryzen 9 9900X3D
91.1Inno Score
VS
AMD Ryzen 9 PRO 9945
81.4Inno Score
94.9Single-core86.4
87Multi-core76.9
93.8Gamingspec-based83.3
7 spec wins — AMD Ryzen 9 9900X3D2 spec wins — AMD Ryzen 9 PRO 9945

InnoReviews verdict

AMD Ryzen 9 9900X3D wins this desktop processor face-off, 91.1 to 81.4, pulling ahead mainly in multi-core (+10) and single-core (+9). AMD Ryzen 9 PRO 9945 still makes sense if its price or standout specs fit your needs better.

Which would you pick?

Key differences

Reasons to pick the AMD Ryzen 9 9900X3D

  • Stronger single-core score: 95 vs 86
  • Stronger multi-core score: 87 vs 77
  • 100% higher L3 cache: 128 MB vs 64 MB
  • 33% higher Max memory: 256 GB vs 192 GB
  • 29% higher Base clock: 4.4 GHz vs 3.4 GHz

Reasons to pick the AMD Ryzen 9 PRO 9945

  • 46% lower Base TDP: 65 W vs 120 W
  • Has Cooler included — the other doesn't

General

General comparison: AMD Ryzen 9 9900X3D versus AMD Ryzen 9 PRO 9945
SpecAMD Ryzen 9 9900X3DAMD Ryzen 9 PRO 9945
Announced20252025
SocketAM5AM5
Process4 nm4 nm
Base TDP120 W65 W+46%
Unlocked multiplierYesNo
Cooler includedNoYes

Cores & Clocks

Cores & Clocks comparison: AMD Ryzen 9 9900X3D versus AMD Ryzen 9 PRO 9945
SpecAMD Ryzen 9 9900X3DAMD Ryzen 9 PRO 9945
Cores1212
Performance cores1212
Efficiency cores00
Threads2424
Base clock4.4 GHz+29%3.4 GHz
Boost clock5.5 GHz+2%5.4 GHz
L2 cache12 MB12 MB
L3 cache128 MB+100%64 MB

Integrated GPU

Integrated GPU comparison: AMD Ryzen 9 9900X3D versus AMD Ryzen 9 PRO 9945
SpecAMD Ryzen 9 9900X3DAMD Ryzen 9 PRO 9945
iGPUAMD Radeon Graphics (2 CU RDNA 2)AMD Radeon Graphics (2 CU)
iGPU clock2,200 MHz2,200 MHz

Memory

Memory comparison: AMD Ryzen 9 9900X3D versus AMD Ryzen 9 PRO 9945
SpecAMD Ryzen 9 9900X3DAMD Ryzen 9 PRO 9945
Memory supportDDR5-5600DDR5-5600
Max memory256 GB+33%192 GB
Memory channels22

Platform

Platform comparison: AMD Ryzen 9 9900X3D versus AMD Ryzen 9 PRO 9945
SpecAMD Ryzen 9 9900X3DAMD Ryzen 9 PRO 9945
PCIe version55
CPU PCIe lanes2828

Benchmarks

Benchmarks comparison: AMD Ryzen 9 9900X3D versus AMD Ryzen 9 PRO 9945
SpecAMD Ryzen 9 9900X3DAMD Ryzen 9 PRO 9945
Geekbench 6 (single)3,388Top 5%—
Geekbench 6 (multi)20,889Top 15%—
PassMark56,050+15%Top 10%48,664Top 15%
PassMark (single thread)4,628Top 10%4,619Top 10%
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