Intel Core i9-7940X vs Intel Core i9-9940X

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Core i9-7940X compared with Core i9-9940X

	IntelCore i9-7940X	IntelCore i9-9940X
Overview
Released
Released	September 2017	2018
Cores and clocks
Cores
Cores	14	14
Threads
Threads	28	28
Base clock
Base clock	3.1 GHz	3.3 GHz
Boost clock
Boost clock	4.4 GHz	4.5 GHz (better)
L3 cache
L3 cache	19.25 MB	19.25 MB
Cores
Cores	Skylake-X; 14 cores with Hyper-Threading. The unlocked multiplier is confirmed by Intel’s exact-model family product brief.	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 4.40 GHz on the preferred core; ordinary Turbo Boost 2.0 up to 4.30 GHz. The main boost field uses Intel’s highest published frequency. Intel’s August family notice explicitly states that the new fourteen- to eighteen-core processors would be available on 25 September 2017; Puget’s contemporary exact-model tests confirm availability that day.	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).	19.25 MB Intel Smart Cache; L3 designation confirmed by the exact Newegg listing.
Graphics and AI
Built-in graphics
Built-in graphics	No	No
Graphics
Graphics	No processor graphics, explicitly stated in Intel’s exact-model comparison-chart row; a separate graphics solution is required.	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.	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 (CHIP exact-model review); Skylake-X. Current Intel specifications omit lithography.	14 nm; Skylake-X refresh.
Cooler
Cooler	Intel explicitly excludes a fan and heatsink from the boxed product; a separate compatible cooler is required. Published junction limit: 102°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 88°C.