AMD Ryzen 9 3900XT vs AMD Ryzen 9 9950X

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Ryzen 9 3900XT compared with Ryzen 9 9950X

	AMDRyzen 9 3900XT	AMDRyzen 9 9950X
Overview
Released
Released	July 2020	August 2024
Cores and clocks
Cores
Cores	12	16 (better)
Threads
Threads	24	32 (better)
Base clock
Base clock	3.8 GHz	4.3 GHz
Boost clock
Boost clock	4.7 GHz	5.7 GHz (better)
L3 cache
L3 cache	64 MB	64 MB
Cores
Cores	Zen 2; Matisse	16 Zen 5 cores with simultaneous multithreading; codename Granite Ridge AM5; 3 dies in the package
Clocks
Clocks	–	Precision Boost 2; Precision Boost Overdrive and Curve Optimizer supported
Cache
Cache	L2 6 MB	L1 1280 KB, L2 16 MB, L3 64 MB
Graphics and AI
Built-in graphics
Built-in graphics	No	Yes
Graphics
Graphics	A separate graphics card is required	AMD Radeon Graphics, 2 graphics cores at 2200 MHz; USB-C DisplayPort Alt Mode
Platform
Socket
Socket	AM4	AM5
Base power
Base power	105 W	170 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	DDR5, 2 channels, up to 256 GB (UDIMM); DDR5-5600 with 2 modules, DDR5-3600 with 4; ECC with motherboard support
PCIe
PCIe	PCIe 4.0	PCIe 5.0; 28 lanes (24 usable); native USB: 4 × USB 3.2 Gen 2 (10Gbps), 1 × USB 2.0
Chipsets
Chipsets	–	A620, X670E, X670, B650E, B650, X870E, X870, B840, B850
Process
Process	TSMC 7nm FinFET	TSMC 4nm FinFET (CPU cores), TSMC 6nm FinFET (I/O die)
Cooler
Cooler	No cooler included; AMD recommends a liquid cooler with at least a 280 mm radiator or equivalent air cooling; Tjmax 95°C	Not included; Liquid cooler recommended for optimal performance; Tjmax 95°C