AMD Ryzen 9 3900X vs AMD Ryzen 9 9950X

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Ryzen 9 3900X compared with Ryzen 9 9950X

	AMDRyzen 9 3900X	AMDRyzen 9 9950X
Overview
Released
Released	July 2019	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	4.6 GHz	5.7 GHz (better)
L3 cache
L3 cache	64 MB	64 MB
Cores
Cores	Zen 2; Matisse; twelve cores with simultaneous multithreading. Two CPU chiplets with six active cores each and a separate I/O die (PCGamesN).	16 Zen 5 cores with simultaneous multithreading; codename Granite Ridge AM5; 3 dies in the package
Clocks
Clocks	Unlocked for overclocking; Precision Boost Overdrive with Automatic Overclocking supported, as described in AMD's launch notice.	Precision Boost 2; Precision Boost Overdrive and Curve Optimizer supported
Cache
Cache	768 KB L1; 6 MB L2; 64 MB L3.	L1 1280 KB, L2 16 MB, L3 64 MB
Graphics and AI
Built-in graphics
Built-in graphics	No	Yes
Graphics
Graphics	No integrated 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	Yes	No
Memory support
Memory support	DDR4; two channels; 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 x16; AMD introduced PCIe 4.0 support with the X570 platform at launch.	PCIe 5.0; 28 lanes (24 usable); native USB: 4 × USB 3.2 Gen 2 (10Gbps), 1 × USB 2.0
Chipsets
Chipsets	X570 at launch; check the motherboard's CPU support list and BIOS for other AM4 boards.	A620, X670E, X670, B650E, B650, X870E, X870, B840, B850
Process
Process	TSMC 7nm FinFET CPU cores; 14nm I/O die (PCGamesN).	TSMC 4nm FinFET (CPU cores), TSMC 6nm FinFET (I/O die)
Cooler
Cooler	Retail boxed processor includes an RGB cooler (PCGamesN; inclusion also confirmed by TechRadar); AMD's current support specification does not name a cooler. Maximum operating temperature 95°C.	Not included; Liquid cooler recommended for optimal performance; Tjmax 95°C