AMD · Threadripper

Ryzen Threadripper PRO 3975WX

Released September 2020

A 32-core Zen 2 workstation processor for sWRX8, with eight-channel DDR4 memory, 128 MB L3 cache and PCIe 4.0.

Cores: 32/64
Boost: 4.2 GHz
L3: 128 MB
Power: 280 W
Socket: sWRX8

What reviewers say

Reviewers find strong performance in demanding workstation tasks: IT Pro praised the CPU results in its Chillblast Fusion Threadripper Pro RTX 3975WX workstation, while ServeTheHome sees the 3975WX as a balanced PRO option. ServeTheHome notes that the non-PRO 3970X can be slightly faster in workloads that do not benefit from the extra memory bandwidth.

From servethehome.com and itpro.com

Specifications

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Cores and clocks

Cores: 32
Threads: 64
Base clock: 3.5 GHz
Boost clock: 4.2 GHz
L3 cache: 128 MB
Cores: Castle Peak; Zen 2. Boxed product ID 100-100000086WOF; tray ID 100-000000086. Announced 14 July 2020. Lenovo stated September 2020 availability for the first ThinkStation P620 systems, and confirmed them shipping on 14 October. Release is kept at OEM month precision; an exact first-sale day for this model is unpublished. AMD later announced March 2021 standalone retail availability for this model.
Clocks: Precision Boost 2; maximum boost up to 4.2 GHz. Locked for overclocking.
Cache: L1 2048 KB; L2 16 MB; L3 128 MB

Graphics and AI

Built-in graphics: No
Graphics: A separate graphics card is required

Platform

Socket: sWRX8
Base power: 280 W
Unlocked: No
Memory support: DDR4; eight channels; up to 3200 MT/s. AMD’s exact-model launch table supports up to 2 TB ECC UDIMM, RDIMM or LRDIMM memory; motherboard and system limits can be lower.
PCIe: PCIe 4.0; AMD’s exact-model launch table lists 128 lanes
Process: CPU cores: TSMC 7 nm FinFET
Cooler: AMD’s current specification does not state whether a cooler is included. Maximum operating temperature 90°C.

Pros and cons

Pros

32 cores and 64 threads
Eight-channel memory with ECC support
PCIe 4.0 expansion support

Cons

280 W TDP
Requires a compatible workstation motherboard
No integrated graphics

Closest rivals

Model	Cores	Boost	L3	Power	Socket	Released
AMDRyzen Threadripper 3970X	32/64	4.5 GHz	128 MB	280 W	sTRX4	Nov 2019
AMDRyzen Threadripper PRO 5975WX	32/64	4.5 GHz	128 MB	280 W	sWRX8	Mar 2022
AMDRyzen Threadripper 2990WX	32/64	4.2 GHz	64 MB	250 W	sTR4	Aug 2018

Newer model: Ryzen Threadripper PRO 5975WX.

Sources

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