NickTheGrip
I have 7 Ultimate (64bit) on my gaming rig and I run everything fine with no issues and no special settings
I DO completely recommend a clean install, not an upgrade, which you can ONLY do from Vista. If you go from XP direct to 7, it will be a clean install anyway.
7 gives you the option to load the 64 bit, even on a 32 bit system with no conflicts. Forgive me if I'm wrong but that was never possible before. You had to have 64 bit processor to load a 64 bit system
You can do a clean install from an upgrade package also. Make sure you boot from the DVD and a few screens in it will ask you whether you want to upgrade your existing or install a clean one. Obviously the upgrade will keep everything and takes forever. Thee clean install wipes everything (Even gives you a format disk option to get rid of those stupid manufacturers partitions)