Consumercarts is reader-supported. Learn more
AMD Ryzen Threadripper PRO 3975WX vs AMD Threadripper PRO 7945WX: Comparison
Ryzen Threadripper PRO 3975WX vs Threadripper PRO 7945WX: the l3 cache difference
L3 cache is where these two genuinely part company, Ryzen Threadripper PRO 3975WX 128 MB against Threadripper PRO 7945WX 76 MB, a 41% lead for Ryzen Threadripper PRO 3975WX. Core count is not the same on both, 32 cores on the Ryzen Threadripper PRO 3975WX versus 12 cores on the Threadripper PRO 7945WX. There is a split on thread count as well, 64 threads on the Ryzen Threadripper PRO 3975WX versus 24 threads on the Threadripper PRO 7945WX. There is a split on base clock as well, 3.5 GHz on the Ryzen Threadripper PRO 3975WX versus 4.1 GHz on the Threadripper PRO 7945WX.
Who each one is for
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 Threadripper PRO 7945WX is the one to take for users entering workstation platforms for the first time and Multi-GPU or multi-NVMe builds needing extra PCIe lanes, though it is not built for users who need maximum core count and gaming-only builds. Our rating of the Threadripper PRO 7945WX (8.6/10): the Threadripper PRO 7945WX is the most accessible way into the Threadripper PRO platform, trading some core count for a lower price while keeping the ECC memory support and PCIe lane advantage that define the lineup.
Frequently asked questions
Do the Ryzen Threadripper PRO 3975WX and Threadripper PRO 7945WX differ on boost clock?
Yes. Boost Clock reads 4.2 GHz on the Ryzen Threadripper PRO 3975WX versus 5.3 GHz on the Threadripper PRO 7945WX.
Is the Memory Channels the same on the Ryzen Threadripper PRO 3975WX and Threadripper PRO 7945WX?
It is. Both are listed at 8 channels, so it is not a reason to pick one over the other.
Specs and benchmarks
Release Year
- AMD Ryzen Threadripper PRO 3975WX
- 2020
- AMD Threadripper PRO 7945WX
- 2023
Core Count
- AMD Ryzen Threadripper PRO 3975WX
- 32 cores
- AMD Threadripper PRO 7945WX
- 12 cores
Thread Count
- AMD Ryzen Threadripper PRO 3975WX
- 64 threads
- AMD Threadripper PRO 7945WX
- 24 threads
Base Clock
- AMD Ryzen Threadripper PRO 3975WX
- 3.5 GHz
- AMD Threadripper PRO 7945WX
- 4.1 GHz
Boost Clock
- AMD Ryzen Threadripper PRO 3975WX
- 4.2 GHz
- AMD Threadripper PRO 7945WX
- 5.3 GHz
L3 Cache
- AMD Ryzen Threadripper PRO 3975WX
- 128 MBBest
- AMD Threadripper PRO 7945WX
- 76 MB-41%
Socket
- AMD Ryzen Threadripper PRO 3975WX
- sWRX8
- AMD Threadripper PRO 7945WX
- sWRX8
Memory Channels
- AMD Ryzen Threadripper PRO 3975WX
- 8 channels
- AMD Threadripper PRO 7945WX
- 8 channels
ECC Support
- AMD Ryzen Threadripper PRO 3975WX
- Yes
- AMD Threadripper PRO 7945WX
- Yes
TDP
- AMD Ryzen Threadripper PRO 3975WX
- 280 W
- AMD Threadripper PRO 7945WX
- 350 W
Memory Support
- AMD Ryzen Threadripper PRO 3975WX
- DDR4-3200 ECC RDIMM
- AMD Threadripper PRO 7945WX
- 8-channel ECC DDR5Best
Which one should you pick?
Choose 3975WX if you want the higher L3 cache (128 MB vs 76 MB) and the higher memory channels (8 channels vs 8 channels).
Choose 7945WX if you already have it on hand or find it at a lower price.
Verdict
AMD Threadripper PRO 7945WX
8.6 / 10 Expert Rating
The Threadripper PRO 7945WX is the most accessible way into the Threadripper PRO platform, trading some core count for a lower price while keeping the ECC memory support and PCIe lane advantage that define the lineup.