Intel Core i7-7800X vs Intel Core i7-8700K

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Core i7-7800X compared with Core i7-8700K

	IntelCore i7-7800X	IntelCore i7-8700K
Overview
Released
Released	June 2017	October 2017
Cores and clocks
Cores
Cores	6	6
Threads
Threads	12	12
Base clock
Base clock	3.5 GHz	3.7 GHz
Boost clock
Boost clock	4 GHz	4.7 GHz (better)
L3 cache
L3 cache	8.25 MB	12 MB (better)
Cores
Cores	Skylake-X; 6 cores with Hyper-Threading. The unlocked multiplier is confirmed by Intel’s exact-model family product brief.	6 cores and 12 threads; Coffee Lake architecture; multiplier unlocked.
Clocks
Clocks	Turbo Boost 2.0 up to 4.00 GHz. 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.	3.7 GHz base; up to 4.7 GHz Intel Turbo Boost 2.0.
Cache
Cache	8.25 MB Intel Smart Cache (L3).	–
Graphics and AI
Built-in graphics
Built-in graphics	No	Yes
Graphics
Graphics	No processor graphics, explicitly stated in Intel’s exact-model comparison-chart row; a separate graphics solution is required.	Intel UHD Graphics 630; 350 MHz base, up to 1.2 GHz; Quick Sync Video; up to three displays.
Platform
Socket
Socket	LGA2066	LGA1151
Base power
Base power	140 W	95 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 DDR4-2400; 77 GB/s maximum published bandwidth; no ECC. Current exact-model Intel specifications list DDR4-2400; the family comparison chart’s DDR4-2666 entry conflicts and is not used.	Up to 128 GB on the current Intel specification page; two channels; DDR4-2666; 41.6 GB/s; ECC not supported.
PCIe
PCIe	28 CPU lanes; PCIe 3.0.	PCIe 3.0; 16 CPU lanes: 1 × 16, 2 × 8 or 1 × 8 + 2 × 4. This excludes chipset lanes.
Chipsets
Chipsets	Intel X299; LGA2066.	Intel 300-series motherboards; Z370 at launch. Older 100- and 200-series boards are incompatible despite sharing the LGA1151 socket (TechPowerUp and PC Gamer).
Process
Process	14 nm; Skylake-X.	14 nm; 37.5 × 37.5 mm package; 100°C maximum junction temperature.
Cooler
Cooler	Intel explicitly excludes a fan and heatsink from the boxed product; a separate compatible cooler is required. Published junction limit: 100°C.	No fan or heatsink included with the boxed processor (Intel specifications).