AMD Ryzen Threadripper 3990X vs AMD Ryzen Threadripper 9960X

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Ryzen Threadripper 3990X compared with Ryzen Threadripper 9960X

	AMDRyzen Threadripper 3990X	AMDRyzen Threadripper 9960X
Overview
Released
Released	February 2020	July 2025
Cores and clocks
Cores
Cores	64 (better)	24
Threads
Threads	128 (better)	48
Base clock
Base clock	2.9 GHz	4.2 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 product ID 100-100001595WOF; tray 100-000001595. AMD's 25 July 2025 launch blog confirms shipping from 31 July, following the earlier Computex announcement.
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 1920 KB; L2 24 MB; the advertised 152 MB combined cache includes L2 and L3
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; four channels; up to 6400 MT/s. ECC enabled by default; AMD EXPO supported. AMD's TRX50 platform table specifies up to 1 TB memory.
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; 92 native/platform lanes, 88 usable. AMD's launch platform table distinguishes up to 80 PCIe 5.0 lanes. Four native USB 3.2 Gen 2 ports and two SATA ports; NVMe boot and RAID 0, 1, 10 and 5 supported.
Chipsets
Chipsets	–	TRX50
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. Five package dies.
Cooler
Cooler	Cooler not included; AMD recommends liquid cooling. Maximum operating temperature 95°C.	Cooler not included; maximum operating temperature 95°C