If you're asking which one to buy, dont buy XP Pro x64, as it has alot of compatibility issues. Buy Vista x64 if you're looking for a new OS.
Yes im sure, do not buy XP Pro x64. If you want a 64-Bit OS, get Vista.Are you sure coz i was thinking to buy one(XP Pro x64)
I believe that Vista Ultimate comes with both 32 and 64-Bit versions, but im not sure.Thanks a lot guys you guys now I will go with vista 64.But I still a question.Does vista also comes in 32 and 64 version?In my understanding I think vista is available only in 64 version.Is it true?
No, lol. I've used both and I cant even tell the difference, but thats because there are barely any 64-Bit apps out there, and at the time no one used 4GB or more of RAM. But once those two things start to happen, you will notice the difference.if my win xp were to suddenly switch to 64 bit would i freak out at the performance change?