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AMD Ryzen Threadripper PRO 3955WX vs AMD Ryzen Threadripper PRO 3995WX: Comparison
Ryzen Threadripper PRO 3955WX vs Ryzen Threadripper PRO 3995WX: the l3 cache difference
L3 cache is where these two genuinely part company, Ryzen Threadripper PRO 3955WX 64 MB against Ryzen Threadripper PRO 3995WX 256 MB, a 75% lead for Ryzen Threadripper PRO 3995WX. SPECrate® 2017 Integer (base), 1-chip backs the spec sheet up. Ryzen Threadripper PRO 3995WX scores 369 to 133, 64% clear. Add l2 cache to that, 8 MB on the Ryzen Threadripper PRO 3955WX versus 32 MB on the Ryzen Threadripper PRO 3995WX, and the pattern holds. There is a split on base clock as well, 3.9 GHz on the Ryzen Threadripper PRO 3955WX versus 2.7 GHz on the Ryzen Threadripper PRO 3995WX. There is a split on memory support as well, DDR4, 8-Channel, Up to 3200 MT/s on the Ryzen Threadripper PRO 3955WX versus DDR4-3200 ECC RDIMM on the Ryzen Threadripper PRO 3995WX.
Ryzen Threadripper PRO 3955WX vs Ryzen Threadripper PRO 3995WX: which one fits your build
The Ryzen Threadripper PRO 3955WX suits mainstream desktop builds and everyday productivity, though it is the wrong buy for extreme overclocking (unless K/X-series) and workstation-class multi-threaded workloads. Take the Ryzen Threadripper PRO 3995WX for the most demanding professional workstation workloads needing genuine 64-core, 128-thread single-socket throughput. It is not the one for anyone outside extreme professional workstation use, this is specialized, expensive hardware far beyond consumer or gaming needs.
What Ryzen Threadripper PRO 3955WX and Ryzen Threadripper PRO 3995WX have in common
The common ground is wider than the gap: tdp, memory channels, release year, socket and max memory speed are identical here. They match on 1 further specification as well.
Frequently asked questions
Do the Ryzen Threadripper PRO 3955WX and Ryzen Threadripper PRO 3995WX differ on boost clock?
Yes. Boost Clock reads Up to 4.3 GHz on the Ryzen Threadripper PRO 3955WX versus 4.2 GHz on the Ryzen Threadripper PRO 3995WX.
Is the PCIe Generation the same on the Ryzen Threadripper PRO 3955WX and Ryzen Threadripper PRO 3995WX?
It is. Both are listed at PCIe 4.0, so it is not a reason to pick one over the other.
Specs and benchmarks
Release Year
- AMD Ryzen Threadripper PRO 3955WX
- 2020
- AMD Ryzen Threadripper PRO 3995WX
- 2020
Core Count
- AMD Ryzen Threadripper PRO 3955WX
- 16 cores
- AMD Ryzen Threadripper PRO 3995WX
- 64 cores
Thread Count
- AMD Ryzen Threadripper PRO 3955WX
- 32 threads
- AMD Ryzen Threadripper PRO 3995WX
- 128 threads
Base Clock
- AMD Ryzen Threadripper PRO 3955WX
- 3.9 GHz
- AMD Ryzen Threadripper PRO 3995WX
- 2.7 GHz
Boost Clock
- AMD Ryzen Threadripper PRO 3955WX
- Up to 4.3 GHz
- AMD Ryzen Threadripper PRO 3995WX
- 4.2 GHz
L2 Cache
- AMD Ryzen Threadripper PRO 3955WX
- 8 MB-75%
- AMD Ryzen Threadripper PRO 3995WX
- 32 MBBest
L3 Cache
- AMD Ryzen Threadripper PRO 3955WX
- 64 MB-75%
- AMD Ryzen Threadripper PRO 3995WX
- 256 MBBest
Socket
- AMD Ryzen Threadripper PRO 3955WX
- sWRX8
- AMD Ryzen Threadripper PRO 3995WX
- sWRX8
Memory Channels
- AMD Ryzen Threadripper PRO 3955WX
- 8 channels
- AMD Ryzen Threadripper PRO 3995WX
- 8 channels
Max Memory Speed
- AMD Ryzen Threadripper PRO 3955WX
- 3200 MT/s
- AMD Ryzen Threadripper PRO 3995WX
- 3200 MT/s
PCIe Generation
- AMD Ryzen Threadripper PRO 3955WX
- PCIe 4.0
- AMD Ryzen Threadripper PRO 3995WX
- PCIe 4.0
TDP
- AMD Ryzen Threadripper PRO 3955WX
- 280 W
- AMD Ryzen Threadripper PRO 3995WX
- 280 W
Memory Support
- AMD Ryzen Threadripper PRO 3955WX
- DDR4, 8-Channel, Up to 3200 MT/s
- AMD Ryzen Threadripper PRO 3995WX
- DDR4-3200 ECC RDIMM
Benchmarks
- General CPU
SPECrate® 2017 Integer (base), 1-chip
- AMD Ryzen Threadripper PRO 3955WX
- 133-64%
- AMD Ryzen Threadripper PRO 3995WX
- 369Best
Best published 1-chip result on spec.org, retrieved 23 Sept 2026.
Server-style tasks like compiling and compression on every thread. Best for judging workstation and server work.
SPECrate® 2017 Floating Point (base), 1-chip
- AMD Ryzen Threadripper PRO 3955WX
- 115-58%
- AMD Ryzen Threadripper PRO 3995WX
- 273Best
Best published 1-chip result on spec.org, retrieved 23 Sept 2026.
Scientific and engineering tasks on every thread. Rewards core count and memory bandwidth.
SPEC®, SPECrate® and SPECspeed® are registered trademarks of the Standard Performance Evaluation Corporation. Copied by permission of the Standard Performance Evaluation Corporation (SPEC). Results retrieved from www.spec.org on 23 Sept 2026.
Which one should you pick?
Choose 3955WX if you want the higher memory channels (8 channels vs 8 channels).
Choose 3995WX if you want the higher L2 cache (32 MB vs 8 MB), the higher L3 cache (256 MB vs 64 MB) and the higher SPECrate® 2017 integer (base), 1-chip (369 vs 133).