<Tr> <Th> Min . feature size </Th> <Td> 65 nm to 45 nm </Td> </Tr> <Tr> <Th> Instruction set </Th> <Td> x86, x86 - 64, (SSE4. 1 is for 45 nm processors only) </Td> </Tr> <Tr> <Th> Microarchitecture </Th> <Td> Core </Td> </Tr> <Tr> <Th> Cores </Th> <Td> 1, 2, or 4 (2x2) </Td> </Tr>

Internal architecture of intel core 2 duo processor