The AMD Ryzen Threadripper Pro 3975WX is the mid-range public part of its generation. It offers twice as many cores as the Threadripper Pro 3955WX yet half the cores of the AMD Threadripper Pro 3995WX chip offers. This 32 core part is, at its core, an EPYC processor designed for the workstation market which is why we call it a workstation EPYC or “WEPYC.” In this review, we are going to take a look at what this
AMD Ryzen Threadripper Pro 3975WX Overview
The AMD Threadripper Pro 3975WX is a 32-core part, that is designed to be more mainstream than the lower-end 3955WX and yet be a lower-cost alternative to the 3995WX.
Key stats for the AMD Threadripper Pro 3975WX: 32 cores / 64 threads with a 3.5GHz base clock and 4.2GHz turbo boost. There is 128MB of onboard L3 cache. The CPU features a 280W TDP. These are $2749 list price parts.
Here is the lscpu output for the Threadripper Pro 3975WX:
If you see the official SKU list, you will notice that AMD lists 144MB of “Total Cache” but that is 16MB of L2 plus 128MB of L3 cache. On a cache per core basis, this is similar to the Threadripper Pro 3995WX with 0.5MB of L2 and 4MB of L3 cache per core.
In the SKU stack, there is a bit more than a 2x price premium over the 16-core 3955WX which seems reasonable. It is also roughly half the cost of the 64-core 3995WX. We can see this being a popular part with 32 cores which is more than Intel offered in a single socketed CPU until its Ice Lake Xeon launch. For those using dual-Intel Xeon workstations, this is a single-socket alternative. Indeed, if one had a 16 core dual Intel Xeon E5-2600 V4 workstation, AMD is offering a single socket solution with the same number of cores, more cache, and the same number of memory channels (albeit higher-speed memory channels.)
We should also mention that there is a parallel between this 3975WX and the AMD Ryzen Threadripper 3970X. The best way to describe the difference is that, while they both have 32-cores, the 3975WX is positioned as a higher-end workstation part. Really this is the part designed to replace legacy dual Xeon workstations. We get more PCIe lanes and ECC RDIMM support similar to what we get on the EPYC side. We however get a chipset on these platforms for some of the more workstation-centric connectivity that we do not get on the EPYC side.
Frankly, it is a bit confusing. We wish that AMD streamlined the EPYC/ Threadripper/ Threadripper Pro series. This is more of an EPYC than a consumer part and we would take this chip over the Threadripper 3970X in most cases just because of the better memory support and the PCIe connectivity.
Overall we still get the large platform of EPYC 7002 “Rome”, but and higher clock speeds/ TDP, but the only significant feature we are missing is that this is 1 DIMM per channel versus 2 DIMMs per channel for the EPYC line and we also get a chipset to handle I/O such as USB connectivity.
With that background, let us get to benchmarks.