vault dveller said:
my friend who i helped to buil a system has 500w psu and 2.8ghz C2Q 9xxx and 5770 sappihire gpu, he has done fine whit it
but my psu says max peak:550 and max combined 140w+348w=488w WTF!??!
what matters is the 12v amperage.
That's right. More than the supposed wattage, what really matters is the total amperage on the +12Volt rail(s). A decent quality 500 watt 80+ unit is gonna have close to 40 Amps combined on it's +12V rail(s). [Volt X Ampere = Watt. Hopefully you guys were attentive during your Physics Classes
So 12V X 40A = 480 Watts]. Some manufacturers use dual rails while others go with one.
Coming to your original question, your CPU and GPU choices will really depend on which games you wanna play and at what settings, on what resolution. If you intend to stick to the 9800, get an E5700. Should be more than enough. OC it if you have to. Just make sure you upgrade to the right BIOS version.
Here's a list of the supported CPU's - ASUS P5KC processor support