I installing a Radeon HD6870 GPU into my XPS 420, which has a 375 PSU now. System has a 2Core Duo processor, Windows 32bit, and 4 gig ram. GPU suggests 500 watt minimum PSU and from what I've read, I really should go with that reccomendation.
Looking for a solid and quiet PSU. I can order one on NewEgg or Amazon - but it would be great if I could just pick one up at the near by CompUSA. Trying to stay with a card for under $100. Any suggestions on something CompUSA would carry - or is it best to stay with NewEgg?
Yes, a good brand with 500W is enough, for for safe side I suggest you take 550W PSU with Corsair, ANtec, Seasonic, OCZ, PCP&C, SilverStone attached on it.
You may choose higher PSU in case you want more power in the future, but for now 550W is enough. About where to pick, suit yourself, just remember do not cheap out on PSU, it's the most important thing inside your PC.
If you want to objectively, accurately and scientifically determine what PSU power is required for your Vid card and PC in both watts and 12v rail amps., the forum Utility link below will show you how easy it is to calculate this information and objectively determine which PSUs are quality built, reliable PSUs that can meet your needs. Be advised that the available 12v rail amps. is just as important as the total PSU wattage. You need both to be correct.
Thanks, guys - I appreciate the advice. What I got from all the advice is that there are many options - so go with something you can trust. Picked up a Thermaltake TR2 500W unit from CompUSA on the reccomendation of the tech specialist at the store. He said it was a very reliable unit and would plenty of power and be quiet. I installed it last night. Dramatically is quieter than the orignal Dell PSU and it was very easy to install.