Intel's first 45nm processor, the Core 2 Extreme QX9650, launched last November and it was shortly followed with the launch of the QX9770 - a 200MHz faster, 1600MHz FSB CPU that came at an even higher ...
Yes. All Core 2 Duos are 64-bit. Of course, some computers may be sold with Vista x64, so that might be why it was emphasized in the specs.