Intel Core i5-6600K vs Intel Core i5-7640X

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Core i5-6600K compared with Core i5-7640X

	IntelCore i5-6600K	IntelCore i5-7640X
Overview
Released
Released	August 2015	June 2017
Cores and clocks
Cores
Cores	4	4
Threads
Threads	4	4
Base clock
Base clock	3.5 GHz	4 GHz
Boost clock
Boost clock	3.9 GHz	4.2 GHz (better)
L3 cache
L3 cache	6 MB	6 MB
Cores
Cores	Skylake; four cores without Hyper-Threading; unlocked multiplier confirmed in Intel's Gamescom release	Four cores and four threads; unlocked multiplier confirmed by Tom’s Hardware France’s exact-model table and overclocking test.
Clocks
Clocks	–	Turbo Boost 2.0 up to 4.20 GHz; no Turbo Boost Max 3.0 in Intel’s exact comparison-chart row. Intel’s press-kit record names 26 June 2017 availability for the first Core X processors, and its August record confirms the four- to ten-core models were already on shelves; conservative month precision is retained.
Cache
Cache	–	6 MB cache; L3 designation confirmed by Tom’s Hardware France’s exact-model table.
Graphics and AI
Built-in graphics
Built-in graphics	Yes	No
Graphics
Graphics	Intel HD Graphics 530; maker clocks 350 MHz base and 1.15 GHz maximum dynamic clock, rather than differing launch-review figures	No processor graphics, explicitly confirmed by Intel’s exact-model comparison chart.
Platform
Socket
Socket	LGA1151	LGA2066
Base power
Base power	91 W	112 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 64 GB; two channels of DDR4-2666; 42 GB/s maximum published bandwidth; no ECC.
PCIe
PCIe	16 CPU lanes; PCIe 3.0	16 CPU PCIe 3.0 lanes; up to 1×16, 2×8 or 1×8 plus 2×4.
Chipsets
Chipsets	LGA1151 Skylake platform; Intel's 5 August 2015 release names the 6600K boxed processor and systems as available immediately	Intel X299; LGA2066.
Process
Process	14 nm	14 nm; Kaby Lake-X.
Cooler
Cooler	Intel lists no included heatsink; a separate cooler is required, despite the bundled-cooler implication in Expert Reviews	Intel excludes a fan and heatsink from the boxed product; junction limit 100°C.