AMD · Threadripper

Ryzen Threadripper PRO 3945WX

Released September 2020

A 12-core Zen 2 workstation processor for sWRX8, with eight-channel DDR4 memory, 64 MB L3 cache and PCIe 4.0.

Specifications

Cores: 12
Threads: 24
Base clock: 4 GHz
Boost clock: 4.3 GHz
L3 cache: 64 MB
Cores: Castle Peak; Zen 2. Tray ID 100-000000168. 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 Release is kept at OEM month precision; an exact first-sale day for this model is unpublished. The socket is sWRX8 according to LDLC’s exact tray listing; AMD’s current support page omits it.
Clocks: Precision Boost 2; maximum boost up to 4.3 GHz. Locked for overclocking.
Cache: L1 768 KB; L2 6 MB; L3 64 MB

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.

Closest rivals

Model	Cores	Boost	L3	Power	Socket	Released
IntelCore i9-10920X	12/24	4.8 GHz	19.25 MB	165 W	LGA2066	2019
AMDRyzen Threadripper PRO 3955WX	16/32	4.3 GHz	64 MB	280 W	sWRX8	Sept 2020
IntelCore i7-12700K	12/20	5 GHz	25 MB	125 W	LGA1700	Nov 2021