AMD Ryzen 9 3900XT vs AMD Ryzen 9 3950X

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

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Ryzen 9 3900XT compared with Ryzen 9 3950X

	AMDRyzen 9 3900XT	AMDRyzen 9 3950X
Overview
Released
Released	July 2020	November 2019
Cores and clocks
Cores
Cores	12	16 (better)
Threads
Threads	24	32 (better)
Base clock
Base clock	3.8 GHz	3.5 GHz
Boost clock
Boost clock	4.7 GHz	4.7 GHz
L3 cache
L3 cache	64 MB	64 MB
Cores
Cores	Zen 2; Matisse	Zen 2; Matisse; sixteen cores with simultaneous multithreading. Two fully enabled eight-core CPU chiplets (PC Perspective).
Clocks
Clocks	–	Unlocked for overclocking; Precision Boost 2.
Cache
Cache	L2 6 MB	1024 KB L1; 8 MB L2; 64 MB L3.
Graphics and AI
Built-in graphics
Built-in graphics	No	No
Graphics
Graphics	A separate graphics card is required	No integrated graphics; a separate graphics card is required.
Platform
Socket
Socket	AM4	AM4
Base power
Base power	105 W	105 W
Unlocked
Unlocked	Yes	Yes
Cooler in the box
Cooler in the box	No	No
Memory support
Memory support	DDR4; up to 3200 MT/s	DDR4 UDIMM; two channels; up to 128 GB. Two single-rank or dual-rank modules support 3200 MT/s; four single-rank modules 2933 MT/s and four dual-rank modules 2667 MT/s. ECC requires motherboard support.
PCIe
PCIe	PCIe 4.0	PCIe 4.0; 24 native lanes in total, 20 usable. X570 adds 16 usable PCIe 4.0 lanes.
Chipsets
Chipsets	–	AMD lists X570, X470, X370 and B450; check the motherboard's CPU support list and BIOS.
Process
Process	TSMC 7nm FinFET	TSMC 7nm FinFET CPU cores.
Cooler
Cooler	No cooler included; AMD recommends a liquid cooler with at least a 280 mm radiator or equivalent air cooling; Tjmax 95°C	No cooler included; liquid cooling recommended. AMD's November launch notice recommends an AIO with at least a 280 mm radiator. Maximum operating temperature 95°C.