Intel Core i5-6600K vs Intel Core i5-8600K

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Core i5-6600K compared with Core i5-8600K

	IntelCore i5-6600K	IntelCore i5-8600K
Overview
Released
Released	August 2015	October 2017
Cores and clocks
Cores
Cores	4	6 (better)
Threads
Threads	4	6 (better)
Base clock
Base clock	3.5 GHz	3.6 GHz
Boost clock
Boost clock	3.9 GHz	4.3 GHz (better)
L3 cache
L3 cache	6 MB	9 MB (better)
Cores
Cores	Skylake; four cores without Hyper-Threading; unlocked multiplier confirmed in Intel's Gamescom release	Six cores without Hyper-Threading; Intel Turbo Boost 2.0 supported.
Clocks
Clocks	–	Maximum turbo is a single-core frequency; sustained clocks depend on cooling and motherboard power settings. CPU, graphics and memory overclocking require a supported chipset. Intel publishes TDP without a separate maximum turbo-power figure.
Graphics and AI
Built-in graphics
Built-in graphics	Yes	Yes
Graphics
Graphics	Intel HD Graphics 530; maker clocks 350 MHz base and 1.15 GHz maximum dynamic clock, rather than differing launch-review figures	Intel UHD Graphics 630; 350 MHz base, up to 1.15 GHz; three displays; Quick Sync Video.
Platform
Socket
Socket	LGA1151	LGA1151
Base power
Base power	91 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; two channels; DDR4-1866/2133 or DDR3L-1333/1600 at 1.35 V; maximum bandwidth 34.1 GB/s; no ECC support	Up to 128 GB in the current Intel specifications; two channels; DDR4-2666; 41.6 GB/s maximum bandwidth; ECC not supported. The original eighth-generation product brief listed a 64 GB limit.
PCIe
PCIe	16 CPU lanes; PCIe 3.0	PCIe 3.0; 16 CPU lanes, configured as 1×16, 2×8 or 1×8+2×4.
Chipsets
Chipsets	LGA1151 Skylake platform; Intel's 5 August 2015 release names the 6600K boxed processor and systems as available immediately	–
Process
Process	14 nm	14 nm; Coffee Lake; 37.5 × 37.5 mm package; 100°C maximum junction temperature.
Cooler
Cooler	Intel lists no included heatsink; a separate cooler is required, despite the bundled-cooler implication in Expert Reviews	Boxed processor includes no fan or heatsink. Requires a supported Intel 300-series motherboard despite sharing the LGA1151 socket name with earlier processors.