I'm buying a new case, the Antec P182 Gun Metal Black case, and I am also planning on getting a new PSU as my current one is a few years old and I don't think the cables will be long enough.
In a month or so, I'm going to upgrade video cards from a GeForce 7800GT 256MB to one of the GeForce 8800GTS or GT cards, or one of the GeForce 9800 series.
Questions: I don't plan on getting two cards for SLi; which PSU would be best considering the new video card I'm going to get? Is 700W overkill for 1 card? Better safe than sorry by getting the 700W? What do you guys think?
I haven't looked up your mobo to see if it will support the core2, but I think you should concentrate you money on a faster cooler processor. Of course I don't know what PSU you have now, my advice would probably change. In any case If you have junk then consider the PC Power & Cooling S610EPS EPS12V 610W Continuous @ 40°C . The 450VX will work for you no problem, but the 610 rules. Consider the cheaper than it should be Q6600. Be sure you don't pair it with a junk PSU though. I do have to say killer price on the 450, just don't go power hungry with the OC and GFX card.
Ok, I won't say killer but good price on the 450, still not a 610 though.
600W should be enough. Any current video card is limited to 300W if I remember right (75W from the PCI-E slot, 75W from a 6-pin PCI-E connector, 150W from an 8-pin connector). In fact, even the HD 3870X2 consumes under 200W, and that's the hungriest card AFAIK.
Add another 95W for a Q6600 or 65W for an E8400, plus a bit for hard disks, you still won't have a problem.
I'm voting for the Corsair 620HX. It has very long cables and it's modular, which should help with that P182.