AMD Ryzen Threadripper PRO 3945WX vs AMD Ryzen Threadripper PRO 3955WX

Every spec side by side, from each maker's published figures.

Only show differences

Better figure, where one is clearly better

Share comparison

Ryzen Threadripper PRO 3945WX compared with Ryzen Threadripper PRO 3955WX

	AMDRyzen Threadripper PRO 3945WX	AMDRyzen Threadripper PRO 3955WX
Overview
Released
Released	September 2020	September 2020
Cores and clocks
Cores
Cores	12	16 (better)
Threads
Threads	24	32 (better)
Base clock
Base clock	4 GHz	3.9 GHz
Boost clock
Boost clock	4.3 GHz	4.3 GHz
L3 cache
L3 cache	64 MB	64 MB
Cores
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 Release is kept at OEM month precision; an exact first-sale day for this model is unpublished.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.	Castle Peak; Zen 2. Boxed product ID 100-100000167WOF; tray ID 100-000000167. 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 Release is kept at OEM month precision; an exact first-sale day for this model is unpublished.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
Clocks	Precision Boost 2; maximum boost up to 4.3 GHz. Locked for overclocking.	Precision Boost 2; maximum boost up to 4.3 GHz. Locked for overclocking.
Cache
Cache	L1 768 KB; L2 6 MB; L3 64 MB	L1 1024 KB; L2 8 MB; L3 64 MB
Graphics and AI
Built-in graphics
Built-in graphics	No	No
Graphics
Graphics	A separate graphics card is required	A separate graphics card is required
Platform
Socket
Socket	sWRX8	sWRX8
Base power
Base power	280 W	280 W
Unlocked
Unlocked	No	No
Memory support
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.	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	PCIe 4.0; AMD’s exact-model launch table lists 128 lanes	PCIe 4.0; AMD’s exact-model launch table lists 128 lanes
Process
Process	CPU cores: TSMC 7 nm FinFET	CPU cores: TSMC 7 nm FinFET
Cooler
Cooler	AMD’s current specification does not state whether a cooler is included. Maximum operating temperature 90°C.	AMD’s current specification does not state whether a cooler is included. Maximum operating temperature 90°C.