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AMD Ryzen Threadripper PRO 3975WX vs AMD Ryzen Threadripper PRO 5945WX: Comparison
Ryzen Threadripper PRO 3975WX vs Ryzen Threadripper PRO 5945WX l3 cache compared
The gap that matters here is l3 cache: Ryzen Threadripper PRO 3975WX 128 MB against Ryzen Threadripper PRO 5945WX 64 MB, which puts Ryzen Threadripper PRO 3975WX 50% ahead. Ryzen Threadripper PRO 3975WX also leads on l2 cache, 16 MB on the Ryzen Threadripper PRO 3975WX versus 6 MB on the Ryzen Threadripper PRO 5945WX. There is a split on boost clock as well, 4.2 GHz on the Ryzen Threadripper PRO 3975WX versus Up to 4.5 GHz on the Ryzen Threadripper PRO 5945WX. Release year is not the same on both, 2020 on the Ryzen Threadripper PRO 3975WX versus 2022 on the Ryzen Threadripper PRO 5945WX. They differ on core count too, 32 cores on the Ryzen Threadripper PRO 3975WX versus 12 cores on the Ryzen Threadripper PRO 5945WX. There is a split on thread count as well, 64 threads on the Ryzen Threadripper PRO 3975WX versus 24 threads on the Ryzen Threadripper PRO 5945WX. Base clock is not the same on both, 3.5 GHz on the Ryzen Threadripper PRO 3975WX versus 4.1 GHz on the Ryzen Threadripper PRO 5945WX. They differ on memory support too, DDR4-3200 ECC RDIMM on the Ryzen Threadripper PRO 3975WX versus DDR4, 8-Channel, Up to 3200 MT/s on the Ryzen Threadripper PRO 5945WX.
Which should you buy, Ryzen Threadripper PRO 3975WX or Ryzen Threadripper PRO 5945WX?
Take the Ryzen Threadripper PRO 3975WX for professional workstation workloads needing genuine 32-core, 64-thread single-socket throughput without the top-tier 64-core price. It is not the one for anyone outside professional workstation use, this is specialized, expensive hardware far beyond consumer needs. The Ryzen Threadripper PRO 5945WX suits mainstream desktop builds and everyday productivity, though it is not the pick for extreme overclocking (unless K/X-series) and workstation-class multi-threaded workloads.
Where the two are identical
The common ground is wider than the gap: tdp, memory channels, socket, max memory speed and pcie generation are identical here.
Specs and benchmarks
Release Year
- AMD Ryzen Threadripper PRO 3975WX
- 2020
- AMD Ryzen Threadripper PRO 5945WX
- 2022
Core Count
- AMD Ryzen Threadripper PRO 3975WX
- 32 cores
- AMD Ryzen Threadripper PRO 5945WX
- 12 cores
Thread Count
- AMD Ryzen Threadripper PRO 3975WX
- 64 threads
- AMD Ryzen Threadripper PRO 5945WX
- 24 threads
Base Clock
- AMD Ryzen Threadripper PRO 3975WX
- 3.5 GHz
- AMD Ryzen Threadripper PRO 5945WX
- 4.1 GHz
Boost Clock
- AMD Ryzen Threadripper PRO 3975WX
- 4.2 GHz
- AMD Ryzen Threadripper PRO 5945WX
- Up to 4.5 GHz
L2 Cache
- AMD Ryzen Threadripper PRO 3975WX
- 16 MBBest
- AMD Ryzen Threadripper PRO 5945WX
- 6 MB-62%
L3 Cache
- AMD Ryzen Threadripper PRO 3975WX
- 128 MBBest
- AMD Ryzen Threadripper PRO 5945WX
- 64 MB-50%
Socket
- AMD Ryzen Threadripper PRO 3975WX
- sWRX8
- AMD Ryzen Threadripper PRO 5945WX
- sWRX8
Memory Channels
- AMD Ryzen Threadripper PRO 3975WX
- 8 channels
- AMD Ryzen Threadripper PRO 5945WX
- 8 channels
Max Memory Speed
- AMD Ryzen Threadripper PRO 3975WX
- 3200 MT/s
- AMD Ryzen Threadripper PRO 5945WX
- 3200 MT/s
PCIe Generation
- AMD Ryzen Threadripper PRO 3975WX
- PCIe 4.0
- AMD Ryzen Threadripper PRO 5945WX
- PCIe 4.0
TDP
- AMD Ryzen Threadripper PRO 3975WX
- 280 W
- AMD Ryzen Threadripper PRO 5945WX
- 280 W
Memory Support
- AMD Ryzen Threadripper PRO 3975WX
- DDR4-3200 ECC RDIMM
- AMD Ryzen Threadripper PRO 5945WX
- DDR4, 8-Channel, Up to 3200 MT/s
Which one should you pick?
Choose 3975WX if you want the higher L2 cache (16 MB vs 6 MB), the higher L3 cache (128 MB vs 64 MB) and the higher memory channels (8 channels vs 8 channels).
Choose 5945WX if you already have it on hand or find it at a lower price.