Intel Core i7-875K vs Intel Core i7-920

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Core i7-875K compared with Core i7-920

	IntelCore i7-875K	IntelCore i7-920
Overview
Released
Released	June 2010	November 2008
Cores and clocks
Cores
Cores	4	4
Threads
Threads	8	8
Base clock
Base clock	2.93 GHz	2.66 GHz
Boost clock
Boost clock	3.6 GHz (better)	2.93 GHz
L3 cache
L3 cache	8 MB	8 MB
Cores
Cores	Four cores and eight threads with Hyper-Threading; unlocked multiplier confirmed in both exact reviews.	Four cores with Hyper-Threading; eight simultaneous threads. PCStats confirms a locked CPU multiplier; base-clock overclocking is possible, so locked does not mean all overclocking is disabled.
Clocks
Clocks	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.	Intel's product brief gives up to 2.93 GHz single-core Turbo Boost. Intel's 17 November 2008 sale notice names the 920 and confirms immediate system and boxed retail availability.
Cache
Cache	8 MB shared L3 cache.	–
Graphics and AI
Built-in graphics
Built-in graphics	No	No
Graphics
Graphics	Intel’s exact-model chart lists no processor graphics.	No processor graphics; a separate graphics solution is required. Intel's desktop comparison chart lists graphics as not applicable.
Platform
Socket
Socket	LGA1156	LGA1366
Base power
Base power	95 W	130 W
Unlocked
Unlocked	Yes	No
Cooler in the box
Cooler in the box	No	–
Memory support
Memory support	DDR3-1333 rated maximum in Intel’s exact chart; two-channel memory confirmed by bit-tech’s exact review.	Three channels of DDR3-1066 in Intel's exact-model product brief. A later Intel comparison chart incorrectly lists two channels; the original product brief is used here.
PCIe
PCIe	16 PCIe 2.0 lanes in PC Perspective’s exact-model review introduction.	Intel's product brief describes X58 chipset PCIe 2.0 graphics connectivity, including two ×16 links. These are chipset connections, not CPU-integrated PCIe lanes. CPU-to-chipset QuickPath Interconnect runs at 4.8 GT/s for the 920.
Process
Process	45 nm; Lynnfield.	45 nm; Nehalem architecture.
Cooler
Cooler	The exact Newegg listing and contemporary AKIBA PC Hotline retail report confirm that the boxed model has no cooler.	Requires an LGA1366/X58 platform; incompatible with LGA775 motherboards. Intel's retired specification page could not be read, so optional package temperature and separate maximum-power values are omitted.