Quote - Hm. I run XP64 on an AMD64x2. No problems at all.
Driver support for XP64 isn't perfect, to say the least. My system is all out nVidia, which certainly helps - nVidia has good solid XP64 drivers for both their chipsets and graphics.

I seem to remember something not working properly when I tried XP64 (the trial version).  It was awhile ago, and things might have improved.

Actually, if I remember correctly, the problem was with antivirus software.