32bit versus 64bit

  BillxR 14:00 04 Feb 08

I'm hoping to buy a top end gaming PC and need to understand 32 & 64 bit ?(what). Apparently XP is good on 32bit and Vista on 64 bit but what does it actually mean. Also, as far as new games are concerned, does it matter ? What determines whether the PC is 32 or 64 ?
Appreciate any help you can ofer.

  brundle 14:01 04 Feb 08

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