64bit VISTA help plz!!!

Im going to buy WINDOWS VISTA x64 SP1 .....So guys plz tell me that wheather it is compatible with all the latest and previous year PC games or not. If no then I will go for x86. Plz do reply.

Thnx in advance...

Will my PC support x64 version.......

My SPECS.....

Mother Board --> Intel DG965RY

Processor --> Intel 2.4 CORE 2 DUO

RAM --> 2GIG

HDD --> 1TB

PCI-E --> 8600GT