Intel Core i7-5820K vs Intel Core i7-8700K

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Core i7-5820K compared with Core i7-8700K

	IntelCore i7-5820K	IntelCore i7-8700K
Overview
Released
Released	August 2014	October 2017
Cores and clocks
Cores
Cores	6	6
Threads
Threads	12	12
Base clock
Base clock	3.3 GHz	3.7 GHz
Boost clock
Boost clock	3.6 GHz	4.7 GHz (better)
L3 cache
L3 cache	15 MB (better)	12 MB
Cores
Cores	Haswell-E; six cores with Hyper-Threading; unlocked multiplier and lack of integrated graphics confirmed by exact-model reviews	6 cores and 12 threads; Coffee Lake architecture; multiplier unlocked.
Clocks
Clocks	–	3.7 GHz base; up to 4.7 GHz Intel Turbo Boost 2.0.
Graphics and AI
Built-in graphics
Built-in graphics	No	Yes
Graphics
Graphics	–	Intel UHD Graphics 630; 350 MHz base, up to 1.2 GHz; Quick Sync Video; up to three displays.
Platform
Socket
Socket	LGA2011-v3	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 64 GB; four channels; DDR4-1600/1866/2133; maximum bandwidth 68 GB/s; no ECC support	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	X99 and LGA2011-v3, as distinguished by Intel's Core i7 comparison chart and exact-model reviews. August release month follows Intel's 29 August family availability notice and contemporary exact-model stock coverage; an exact maker-SKU first-sale day was not established.	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	22 nm; package size 52.5 × 45 mm	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 cooler is required	No fan or heatsink included with the boxed processor (Intel specifications).