AMD Ryzen Threadripper 3990X vs AMD Ryzen Threadripper PRO 9975WX

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Ryzen Threadripper 3990X compared with Ryzen Threadripper PRO 9975WX

	AMDRyzen Threadripper 3990X	AMDRyzen Threadripper PRO 9975WX
Overview
Released
Released	February 2020	July 2025
Cores and clocks
Cores
Cores	64 (better)	32
Threads
Threads	128 (better)	64
Base clock
Base clock	2.9 GHz	4 GHz
Boost clock
Boost clock	4.3 GHz	5.4 GHz (better)
L3 cache
L3 cache	256 MB (better)	128 MB
Cores
Cores	Castle Peak; Zen 2 architecture; boxed product ID 100-100000163WOF. Supports TRX40 motherboards. AMD confirms worldwide on-shelf availability on 7 February 2020, after its 6 January announcement.	Shimada Peak; Zen 5 architecture. Boxed 100-100000723WOF; tray 100-000000723. 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	Precision Boost 2; maximum boost up to 4.3 GHz; unlocked for overclocking	Precision Boost 2; Precision Boost Overdrive and Curve Optimizer voltage offsets supported
Cache
Cache	L1 4096 KB; L2 32 MB; the advertised 288 MB combined cache includes L2 and L3	L1 2560 KB; L2 32 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 UDIMM; four channels; maximum 256 GB. Up to 3200 MT/s with four single-rank or dual-rank DIMMs, or 2933 MT/s with eight single-rank DIMMs. ECC requires motherboard support.	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; 64 native lanes, 56 usable, plus 16 usable lanes from TRX40. AMD's launch table lists 88 combined processor/chipset lanes, 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; I/O die: Globalfoundries 12 nm	CPU cores: TSMC 4 nm FinFET; I/O die: TSMC 6 nm FinFET. 5 package dies.
Cooler
Cooler	Cooler not included; AMD recommends liquid cooling. Maximum operating temperature 95°C.	Cooler not included; maximum operating temperature 95°C