Intel Core i5-655K vs Intel Core i5-750

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Core i5-655K compared with Core i5-750

	IntelCore i5-655K	IntelCore i5-750
Overview
Released
Released	June 2010	September 2009
Cores and clocks
Cores
Cores	2	4 (better)
Threads
Threads	4	4
Base clock
Base clock	3.2 GHz	2.66 GHz
Boost clock
Boost clock	3.46 GHz (better)	3.2 GHz
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 four threads; Hyper-Threading is absent. TechRadar's exact Core i5-750 overclocking guide confirms the CPU multiplier is locked; base-clock overclocking remains possible.
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.	Up to 3.20 GHz Turbo Boost. Intel's embedded product brief specifies 3.20 GHz with one or two active cores and 2.80 GHz with four; actual behaviour depends on workload, cooling and platform limits.
Cache
Cache	4 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.	No processor graphics; Intel's desktop comparison chart lists graphics as not applicable. A separate graphics solution is required.
Platform
Socket
Socket	LGA1156	LGA1156
Base power
Base power	73 W	95 W
Unlocked
Unlocked	Yes	No
Cooler in the box
Cooler in the box	No	–
Memory support
Memory support	Two channels of DDR3-1066/1333 in Intel’s exact-model chart.	Two channels of DDR3-1066/1333. Optional maximum memory capacity and bandwidth are omitted because the retired exact-model specification page could not be read.
PCIe
PCIe	–	16 processor PCIe 2.0 lanes, configurable as one ×16 or two ×8 graphics links. A separate DMI link connects the processor to the chipset.
Process
Process	32 nm CPU and separate 45 nm graphics die, as described by bit-tech’s exact review.	45 nm; Lynnfield, based on the Nehalem architecture.
Cooler
Cooler	The exact Newegg listing and contemporary AKIBA PC Hotline retail report confirm that the boxed model has no cooler.	LGA1156 platform, distinct from LGA775 and LGA1366. Intel's 8 September 2009 notice names the 750 and says the new processors and P55 chipset are available that day. Cooler inclusion and package temperature are omitted where maker evidence is unavailable.