Re: AMD64 Ram?
With XP,1GB Should be fine. If you do consider using Vista and upgrade would be recomended. Though what berry120 says is correct,if thing are running ok now,you may want to hold off.
Desktop:BitFenix Survivor~Gigabyte GA-P67A-UD3R~ i7 2600K @ 4hz~AMD 6870 1GB~12gb Team Elite DDR3 1333~3xWD In RAID5~W7 Ult
Laptop:Alienware M11x~ i7-2637M 1.7GHz~16GB 1333MHz DDR3~GeForce GT 540M~W7 Ult