Core 2 Duo

The majority of the desktop and mobile Core 2 processor variants are Core 2 Duo  with two processor cores on a single Merom, Conroe,Allendale, Penryn or Wolfdale chip. These come in a wide range of performance and power consumption, starting with the relatively slow ultra-low-power Uxxxx (10 W) and low-power Lxxxx (17 W) versions, to the more performance oriented Pxxxx (25 W) and Txxxx (35 W) mobile versions and the Exxxx (65 W) desktop models. The mobile Core 2 Duo processors with an 'S' prefix in the name are produced in a smaller µFC-BGA 956 package which allows building more compact laptops.

Within each line, a higher number usually refers to a better performance, which depends largely on core and front-side bus clock frequency and amount of second level cache, which are model specific. Core 2 Duo processors typically use the full L2 cache of 2, 3, 4 or 6 MB available in the specific stepping of the chip, while versions with the amount of cache reduced during manufacturing are sold for the low-end consumer market as Celeron or Pentium Dual-Core processors. Like those processors, some low-end Core 2 Duo models disable features such as Intel Virtualization Technology. Details can be found at the list of Intel Core 2 microprocessors.

Codename (main article)	Brand name (list)	L2 Cache	Socket	TDP
Merom	Mobile Core 2 Duo U7xxx	2 MB	BGA479	10 W
	Mobile Core 2 Duo L7xxx	4 MB		17 W
	Mobile Core 2 Duo T5xxx	2 MB	Socket M Socket P BGA479	35 W
	Mobile Core 2 Duo T7xxx	2–4 MB
Conroe and Allendale	Core 2 Duo E4xxx	2 MB	LGA 775	65 W
	Core 2 Duo E6xxx	2–4 MB
Penryn	Mobile Core 2 Duo SU7xxx	3 MB	BGA956	10W
	Mobile Core 2 Duo SU9xxx
	Mobile Core 2 Duo SL9xxx	6 MB		17 W
	Mobile Core 2 Duo SP9xxx			25 W
	Mobile Core 2 Duo P7xxx	3 MB	Socket P FCBGA6	25 W
	Mobile Core 2 Duo P8xxx
	Mobile Core 2 Duo P9xxx	6 MB
	Mobile Core 2 Duo T6xxx	2 MB		35 W
	Mobile Core 2 Duo T8xxx	3 MB
	Mobile Core 2 Duo T9xxx	6 MB
	Mobile Core 2 Duo E8xxx	6 MB	Socket P	35-55 W
Wolfdale	Core 2 Duo E7xxx	3 MB	LGA 775	65 W
	Core 2 Duo E8xxx	6 MB