What's better... A HD 3650 (AGP), a HD 4350 Silence (PCI) or a 9400 GT (PCI)? I have a very crappy 250W PSU ( thinkin of upgrading) and a Pentium 4 @ 2.00 GHz... Does anyone of these cards run on a 250W PSU or will i have to upgrade that, too? Also, I am thinking of getting a 3.06 GHz P4 for replacement.