AMD Ryzen Threadripper 3970X vs AMD Ryzen Threadripper PRO 9955WX

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Ryzen Threadripper 3970X compared with Ryzen Threadripper PRO 9955WX

	AMDRyzen Threadripper 3970X	AMDRyzen Threadripper PRO 9955WX
Overview
Released
Released	November 2019	July 2025
Cores and clocks
Cores
Cores	32 (better)	16
Threads
Threads	64 (better)	32
Base clock
Base clock	3.7 GHz	4.5 GHz
Boost clock
Boost clock	4.5 GHz	5.4 GHz (better)
L3 cache
L3 cache	128 MB (better)	64 MB
Cores
Cores	Castle Peak; Zen 2 architecture; boxed product ID 100-100000011WOF. Requires sTRX4/TRX40, incompatible with sTR4/X399 motherboards. AMD confirms worldwide first availability on 25 November 2019, after its 7 November announcement.	Shimada Peak; Zen 5 architecture. Boxed 100-100000725WOF; tray 100-000000725. AMD’s 17 July 2025 blog names this model and says PRO 9000 systems are available starting 23 July; announcement and on-sale dates are distinct.
Clocks
Clocks	Maximum boost up to 4.5 GHz; unlocked for overclocking	Precision Boost 2; Precision Boost Overdrive and Curve Optimizer voltage offsets supported
Cache
Cache	L1 2048 KB; L2 16 MB; the advertised 144 MB combined cache includes L2 and L3	L1 1280 KB; L2 16 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	sTRX4	sTR5
Base power
Base power	280 W	350 W
Unlocked
Unlocked	Yes	Yes
Cooler in the box
Cooler in the box	No	No
Memory support
Memory support	DDR4; four channels; up to 3200 MT/s	DDR5 RDIMM; eight channels; up to 6400 MT/s. ECC enabled by default; AMD EXPO supported. WRX90 supports up to 2 TB; TRX50 reduces this to four channels and up to 1 TB.
PCIe
PCIe	PCIe 4.0; AMD publishes 88 lanes across the processor and TRX40 chipset, with 72 usable	PCIe 5.0; 148 native/platform lanes, 144 usable, including 128 PCIe 5.0 lanes with WRX90. TRX50 limits expansion to 92 total/88 usable lanes, including 80 PCIe 5.0. Four native USB 3.2 Gen 2 ports and four SATA ports; NVMe boot and RAID 0, 1, 5 and 10 supported.
Chipsets
Chipsets	–	WRX90, TRX50 and AMD PRO 695; AMD PRO technologies, DASH management and AMD Memory Guard supported. Platform capabilities depend on the motherboard; AMD’s platform guide says OEM systems do not support overclocking.
Process
Process	CPU cores: TSMC 7 nm FinFET	CPU cores: TSMC 4 nm FinFET; I/O die: TSMC 6 nm FinFET. 3 package dies.
Cooler
Cooler	No cooler included; maximum operating temperature 95°C	Cooler not included; maximum operating temperature 95°C