Intel® Core™2 and Core™ Duo and Solo processor families

Letter prefixes indicate a processor class. This is based on a range of power or performance, under which each particular processor's specific power level or performance type resides. Example: a 31W Intel® Core™ Duo processor uses a "T" prefix because 31W falls between 25W and 49W and is therefore a highly energy-efficient processor.
Specific power classes