Intel Core i5-7640X vs Intel Core i7-2600K

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Core i5-7640X compared with Core i7-2600K

	IntelCore i5-7640X	IntelCore i7-2600K
Overview
Released
Released	June 2017	January 2011
Cores and clocks
Cores
Cores	4	4
Threads
Threads	4	8 (better)
Base clock
Base clock	4 GHz	3.4 GHz
Boost clock
Boost clock	4.2 GHz (better)	3.8 GHz
L3 cache
L3 cache	6 MB	8 MB (better)
Cores
Cores	Four cores and four threads; unlocked multiplier confirmed by Tom’s Hardware France’s exact-model table and overclocking test.	Four cores with Hyper-Threading; Intel Turbo Boost 2.0. Expert Reviews and TechRadar confirm the unlocked CPU multiplier.
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.	Maximum turbo is a single-core frequency; sustained clocks depend on cooling. Intel's 5 January launch notice gives 9 January availability for quad-core systems.
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	No	Yes
Graphics
Graphics	No processor graphics, explicitly confirmed by Intel’s exact-model comparison chart.	Intel HD Graphics 3000; 850 MHz base, up to 1.35 GHz; two displays; Quick Sync Video.
Platform
Socket
Socket	LGA2066	LGA1155
Base power
Base power	112 W	95 W
Unlocked
Unlocked	Yes	Yes
Cooler in the box
Cooler in the box	No	–
Memory support
Memory support	Up to 64 GB; two channels of DDR4-2666; 42 GB/s maximum published bandwidth; no ECC.	Up to 32 GB; two channels; DDR3-1066/1333; 21 GB/s maximum bandwidth as Intel publishes; ECC not supported.
PCIe
PCIe	16 CPU PCIe 3.0 lanes; up to 1×16, 2×8 or 1×8 plus 2×4.	PCIe 2.0; 16 CPU lanes.
Chipsets
Chipsets	Intel X299; LGA2066.	–
Process
Process	14 nm; Kaby Lake-X.	32 nm; Sandy Bridge; 37.5 × 37.5 mm package; 72.6°C maximum case temperature, not junction temperature.
Cooler
Cooler	Intel excludes a fan and heatsink from the boxed product; junction limit 100°C.	LGA1155 is incompatible with LGA1156. TechRadar describes the launch P67 chipset as supporting CPU overclocking and H67 as supporting the integrated graphics output; chipset choice affects available features. Intel publishes no separate maximum turbo-power figure.