RULE # 1, 500 wat power supply always if ur going to buy a 6800GT or Ultra and plan on running 7200 RPM hardrive or more. #2 Celeron is horrible. Pentium 4 is horrible. AMD, you buy a $190 AMD venice 3200 and u can overclock it no problem to 2.6 ghz which means that it could eat any INTEL while playing games (intels are faster with photoshop/word things like that, AMD gaming). Third u'll wanna up your graphics card. Wait till the new Nvidia chips are released this summer, then the 6800s will drop alot in price, buy 2 of them, throw them into a nice SLI motherboard (ASUS SLI DELUX is the best u can buy Money and quality wise).