Re:64 bit _Really_ necessary? (Score 1)

I suppose it's not the 64 bit math doing this, but maybe the capabilities opened up in doing it in 64 bits? You do get extra memory addressing and double up on the amount of general purpose registers that you can use when operating in the 64 bit mode. I really don't think it's the memory addressing...and would having double the number of registers really help that much for efficiency ? What else is a legitimate reason for it ?

I'm calling marketing BS on this one...