Intel Core i9-9900X vs Intel Core i9-9920X

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

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Core i9-9900X compared with Core i9-9920X

	IntelCore i9-9900X	IntelCore i9-9920X
Overview
Released
Released	2018	2018
Cores and clocks
Cores
Cores	10	12 (better)
Threads
Threads	20	24 (better)
Base clock
Base clock	3.5 GHz	3.5 GHz
Boost clock
Boost clock	4.5 GHz	4.5 GHz
L3 cache
L3 cache	19.25 MB	19.25 MB
Cores
Cores	Skylake-X refresh; Hyper-Threading and an unlocked multiplier, confirmed by Intel’s exact-model launch table.	Skylake-X refresh; Hyper-Threading and an unlocked multiplier, confirmed by Intel’s exact-model launch table.
Clocks
Clocks	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’s October 2018 announcement planned November availability. Ark’s contemporary exact-model report confirms Japanese retail sale on 14 December 2018, but earlier worldwide sale was not established; year precision is retained.	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	19.25 MB Intel Smart Cache; L3 designation confirmed by ComputerBase’s exact-model technical table and Newegg listing.	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 processor graphics, explicitly confirmed by Intel’s exact-model support table.	No processor graphics, explicitly confirmed by Intel’s exact-model support table.
Platform
Socket
Socket	LGA2066	LGA2066
Base power
Base power	165 W	165 W
Unlocked
Unlocked	Yes	Yes
Cooler in the box
Cooler in the box	No	No
Memory support
Memory support	Up to 128 GB; four channels of DDR4-2666; 85 GB/s maximum published bandwidth; no ECC.	Up to 128 GB; four channels of DDR 4-2666; 85 GB/s maximum published bandwidth; no ECC.
PCIe
PCIe	44 CPU lanes; PCIe 3.0. The 68-lane family platform figure includes chipset lanes.	44 CPU lanes; PCIe 3.0. The 68-lane family platform figure includes chipset lanes.
Chipsets
Chipsets	Intel X299; LGA2066.	Intel X 299; LGA 2066.
Process
Process	14 nm; Skylake-X refresh.	14 nm; Skylake-X refresh.
Cooler
Cooler	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.	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.