Intel Core i9-7920X vs Intel Core i9-7940X

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Core i9-7920X compared with Core i9-7940X

	IntelCore i9-7920X	IntelCore i9-7940X
Overview
Released
Released	September 2017	September 2017
Cores and clocks
Cores
Cores	12	14 (better)
Threads
Threads	24	28 (better)
Base clock
Base clock	2.9 GHz	3.1 GHz
Boost clock
Boost clock	4.4 GHz	4.4 GHz
L3 cache
L3 cache	16.5 MB	19.25 MB (better)
Cores
Cores	Skylake-X; 12 cores with Hyper-Threading. The unlocked multiplier is confirmed by Intel’s exact-model family product brief.	Skylake-X; 14 cores with Hyper-Threading. The unlocked multiplier is confirmed by Intel’s exact-model family product brief.
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 planned availability on 28 August 2017, but contemporary Tom’s Hardware reporting says retail availability followed roughly a week later. September precision reflects that actual-sale evidence rather than the earlier promised date; an exact first-sale day remains unverified.	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.
Cache
Cache	16.5 MB Intel Smart Cache (L3).	19.25 MB Intel Smart Cache (L3).
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 stated in Intel’s exact-model comparison-chart row; a separate graphics solution is required.
Platform
Socket
Socket	LGA2066	LGA2066
Base power
Base power	140 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 DDR4-2666; 85 GB/s maximum published bandwidth; no ECC.
PCIe
PCIe	44 CPU lanes; PCIe 3.0.	44 CPU lanes; PCIe 3.0.
Chipsets
Chipsets	Intel X299; LGA2066.	Intel X299; LGA2066.
Process
Process	14 nm; Skylake-X.	14 nm (CHIP exact-model review); Skylake-X. Current Intel specifications omit lithography.
Cooler
Cooler	Intel explicitly excludes a fan and heatsink from the boxed product; a separate compatible cooler is required. Published junction limit: 95°C.	Intel explicitly excludes a fan and heatsink from the boxed product; a separate compatible cooler is required. Published junction limit: 102°C.