What is this x64 compatible you speak of btw?? meaning it runs faster in a x64 OS?? thats happy news to me since I recently converted to Vista x64 and would be a good payoff.
A x64 proc means it is a 64bit proc, which is meant for 64bit Operating Systems.*they were created ideally for server usage b/c they would run faster, but most hardware was plagued by a lack of x64 driver support, that isn't the case anymore... but now there is Vista x64 and I have yet to see anything geared towards x64 Vista* I have personally tried XP Pro x64 and Vista x64 but there's a huge lack of support.. and it's not hardware related anymore.. it's that developers simply don't care about XP Pro x64 or Vista x64 at this moment* Xp Pro x64 is basically worthless b/c of Vista x64.
You can't use a x64 OS without a x64 Proc and x64 drivers for all hardware.
Intel has yet to make a x64 proc, but the .45nm ones will be x64.
AMD has had them out for a very very long time.