Whats de different between intel cove duo and intel cove 2 duo?

Answer 1

core duo > 32 bit processors
t2x00 & t2x50, fsb is 533 mhz, l2 cache is 2 mb

core 2 duo > 64 bit processors
t5x00, fsb is 667 mhz, l2 cache is 2 mb &
t7x00, fsb is 667 mhz, l2 cache is 4 mb

Answer 2

The correct name is "Core Duo" and "Core 2 Duo" with an "r". The Core architecture is another evolution of the way a processor can process data (like the MMX or SSE extensions before). The Core Duo now uses two processor cores, like the AMD X2 processors.

The Core 2 Duo is just a more energy saving variant of the Core Duo architecture.