Intel Core i7-7820X vs Intel Core i9-7900X

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Core i7-7820X compared with Core i9-7900X

	IntelCore i7-7820X	IntelCore i9-7900X
Overview
Released
Released	June 2017	June 2017
Cores and clocks
Cores
Cores	8	10 (better)
Threads
Threads	16	20 (better)
Base clock
Base clock	3.6 GHz	3.3 GHz
Boost clock
Boost clock	4.5 GHz	4.5 GHz
L3 cache
L3 cache	11 MB	13.75 MB (better)
Cores
Cores	Skylake-X; 8 cores with Hyper-Threading. The unlocked multiplier is confirmed by Intel’s exact-model family product brief.	Skylake-X; 10 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 4.50 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 September press-kit record names 26 June 2017 availability for the first Core X processors; its August record confirms the four- to ten-core models were already on shelves. The exact model’s first-sale day was not established, so month precision is retained.	Turbo Boost Max 3.0 up to 4.50 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 September press-kit record names 26 June 2017 availability for the first Core X processors; its August record confirms the four- to ten-core models were already on shelves. The exact model’s first-sale day was not established, so month precision is retained.
Cache
Cache	11 MB Intel Smart Cache (L3).	13.75 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	140 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	28 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; Skylake-X.
Cooler
Cooler	Intel explicitly excludes a fan and heatsink from the boxed product; a separate compatible cooler is required. Published junction limit: 99°C.	Intel explicitly excludes a fan and heatsink from the boxed product; a separate compatible cooler is required. Published junction limit: 95°C.