Intel Core i5-7640X vs Intel Core i7-7740X

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Core i5-7640X compared with Core i7-7740X

	IntelCore i5-7640X	IntelCore i7-7740X
Overview
Released
Released	June 2017	June 2017
Cores and clocks
Cores
Cores	4	4
Threads
Threads	4	8 (better)
Base clock
Base clock	4 GHz	4.3 GHz
Boost clock
Boost clock	4.2 GHz	4.5 GHz (better)
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.	Kaby Lake-X with Hyper-Threading; unlocked core multiplier confirmed by KitGuru’s exact-model technical 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.	Turbo Boost 2.0 up to 4.50 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.	8 MB cache; L3 designation confirmed by KitGuru’s exact-model table.
Graphics and AI
Built-in graphics
Built-in graphics	No	No
Graphics
Graphics	No processor graphics, explicitly confirmed by Intel’s exact-model comparison chart.	No processor graphics, explicitly confirmed by Intel’s exact-model comparison chart.
Platform
Socket
Socket	LGA2066	LGA2066
Base power
Base power	112 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 of DDR4-2666; 42 GB/s maximum published bandwidth; no ECC.	Up to 64 GB; two channels of DDR4-2666; 42 GB/s maximum published bandwidth; no ECC.
PCIe
PCIe	16 CPU PCIe 3.0 lanes; up to 1×16, 2×8 or 1×8 plus 2×4.	16 CPU PCIe lanes; up to 1×16, 2×8 or 1×8 plus 2×4.
Chipsets
Chipsets	Intel X299; LGA2066.	Intel X299; LGA2066.
Process
Process	14 nm; Kaby Lake-X.	14 nm; Kaby Lake-X.
Cooler
Cooler	Intel excludes a fan and heatsink from the boxed product; junction limit 100°C.	Intel excludes a fan and heatsink from the boxed product; junction limit 100°C.