I bought some on sale parts from a store and built this........ AMD 64 X2 Black Edition, 500 W PSU, 2 Gigs Corsair XMS 6400, EVGA GeForce 9800 GT 512MB, 500GB Western Digital HDD, DVD and even a floppy drive on an Asus M2N-SLI (Nforce 560 chipset). I have XP pro SP2. Should I upgrade to SP3? I have heard of horror stories about SP3 on AMD machines. I don't want to make a decision I will regret later. Does anyone have any experience with SP3 on an AMd system? any advice or suggestions would be appreciated, Thanks.