AMD Ryzen 9 3900X vs Intel Core i9-9920X

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

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Ryzen 9 3900X compared with Core i9-9920X

	AMDRyzen 9 3900X	IntelCore i9-9920X
Overview
Released
Released	July 2019	2018
Cores and clocks
Cores
Cores	12	12
Threads
Threads	24	24
Base clock
Base clock	3.8 GHz	3.5 GHz
Boost clock
Boost clock	4.6 GHz (better)	4.5 GHz
L3 cache
L3 cache	64 MB (better)	19.25 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).	Skylake-X refresh; Hyper-Threading and an unlocked multiplier, confirmed by Intel’s exact-model launch table.
Clocks
Clocks	Unlocked for overclocking; Precision Boost Overdrive with Automatic Overclocking supported, as described in AMD's launch notice.	Turbo Boost Max 3.0 up to 4.50 GHz on the preferred cores; ordinary Turbo Boost 2.0 up to 4.40 GHz. Intel planned November 2018 availability. ASCII’s contemporary report confirms Japanese retail sale on 21 December 2018, but earlier worldwide sale was not established; year precision is retained.
Cache
Cache	768 KB L1; 6 MB L2; 64 MB L3.	19.25 MB Intel Smart Cache; L 3 designation confirmed by Overclockers.ru’s exact-model table.
Graphics and AI
Built-in graphics
Built-in graphics	No	No
Graphics
Graphics	No integrated graphics; a separate graphics card is required.	No processor graphics, explicitly confirmed by Intel’s exact-model support table.
Platform
Socket
Socket	AM4	LGA2066
Base power
Base power	105 W	165 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.	Up to 128 GB; four channels of DDR 4-2666; 85 GB/s maximum published bandwidth; no ECC.
PCIe
PCIe	PCIe 4.0 x16; AMD introduced PCIe 4.0 support with the X570 platform at launch.	44 CPU lanes; PCIe 3.0. The 68-lane family platform figure includes chipset lanes.
Chipsets
Chipsets	X570 at launch; check the motherboard's CPU support list and BIOS for other AM4 boards.	Intel X 299; LGA 2066.
Process
Process	TSMC 7nm FinFET CPU cores; 14nm I/O die (PCGamesN).	14 nm; Skylake-X refresh.
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.	Intel explicitly excludes a fan and heatsink from the boxed product. Intel’s support article confirms solder thermal interface material for this exact model; published junction limit 92°C.