I've gathered about $250 for some upgrades to my pc, I'm going to wait a few months to get an Athlon 64(mainly because of price) so right now I want to upgrade what i have, and be ready for my next upgrade.... System Specs: Athlon XP 1800+ ECS K7S5A 384mb PC2100 DDR GF4 Ti4600 Audigy Gamer 100GB HDD WD SE 8mb cache XP Home cheap 300watt P.S. I am looking at getting a strip of either crucial or Corsair(Value) 512mb PC3200, mainly because I want to be able to use the strip when I move up to a new mobo/processor like the Athlon 64. Will the PC3200 work in my system, I know I wont see the full potential of the Ram, because it will operate as 2100, i just want to be sure the 3200 isnt different in any way...??? I'm also getting an Antec 400w P.S. will this be enough for the newer mobo/proc??