Intel Core i5-655K vs Intel Core i7-875K

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Core i5-655K compared with Core i7-875K

	IntelCore i5-655K	IntelCore i7-875K
Overview
Released
Released	June 2010	June 2010
Cores and clocks
Cores
Cores	2	4 (better)
Threads
Threads	4	8 (better)
Base clock
Base clock	3.2 GHz	2.93 GHz
Boost clock
Boost clock	3.46 GHz	3.6 GHz (better)
L3 cache
L3 cache	4 MB	8 MB (better)
Cores
Cores	Two cores and four threads with Hyper-Threading; unlocked multiplier confirmed in the exact reviews.	Four cores and eight threads with Hyper-Threading; unlocked multiplier confirmed in both exact reviews.
Clocks
Clocks	3.20 GHz base and up to 3.46 GHz Turbo Boost. Intel gives Q2 2010; contemporary AKIBA PC Hotline reporting confirms retail availability in June. May launch coverage and an earlier listing do not establish an exact first-sale day, so month precision is retained.	2.93 GHz base and up to 3.60 GHz Turbo Boost. Intel’s exact comparison chart gives Q2 2010. The 28 May review/announcement precedes the June retail availability documented by AKIBA PC Hotline; month precision is retained because a maker-confirmed first-sale day was not found.
Cache
Cache	4 MB shared L3 cache.	8 MB shared L3 cache.
Graphics and AI
Built-in graphics
Built-in graphics	Yes	No
Graphics
Graphics	Intel HD Graphics at 733 MHz in Intel’s exact-model comparison chart.	Intel’s exact-model chart lists no processor graphics.
Platform
Socket
Socket	LGA1156	LGA1156
Base power
Base power	73 W	95 W
Unlocked
Unlocked	Yes	Yes
Cooler in the box
Cooler in the box	No	No
Memory support
Memory support	Two channels of DDR3-1066/1333 in Intel’s exact-model chart.	DDR3-1333 rated maximum in Intel’s exact chart; two-channel memory confirmed by bit-tech’s exact review.
PCIe
PCIe	–	16 PCIe 2.0 lanes in PC Perspective’s exact-model review introduction.
Process
Process	32 nm CPU and separate 45 nm graphics die, as described by bit-tech’s exact review.	45 nm; Lynnfield.
Cooler
Cooler	The exact Newegg listing and contemporary AKIBA PC Hotline retail report confirm that the boxed model has no cooler.	The exact Newegg listing and contemporary AKIBA PC Hotline retail report confirm that the boxed model has no cooler.