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What GPU should I get for a theoretical PSU?

Hey all, this is kind of a multi-part question.

I have an AMD Athlon II X2 220 Dual Core CPU with 5 GB RAM, and I've been wanting to upgrade my computer for casual gaming.
My current PSU is 250w, and I want to upgrade it to this Corsair 430w:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139026

Hypothetically, if I do buy this power supply, what would be the best GPU to get as well?
(My gpu is an HD 4200, by the way)
I've been thinking about getting an HD 7850, but people have been saying that the 430w isn't good enough.
I'm aiming to stay in the 7850 range, and I'm also willing to get a nVidia GPU, but I wanna note that the PSU above only has one 6-pin connector.

How should I upgrade?
3 answers Last reply Best Answer
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  1. Best answer
    Your cpu is only a 65 watt model. This helps you get by with a smaller power supply.

    On paper alone a 7850 should pose no issues for the power supply(it has 384 watts on its 12 volt rail). It will help if the power supply is bottom mounted in the case because it will see cooler air since it is rated at a lower temperature(I think it was 30c or so).

    Here is a review from Techpowerup showing just the video cards power consumption.
    www.techpowerup.com/reviews/AMD/HD_7850_HD_7870/24.html

    I think as long as you are not overclocking too much or filling the system with many hard drives you should be ok.
  2. You should be OK. The HD 7850 is only a 130W card at max (10.8amp @ +12V): http://www.hwcompare.com/12032/radeon-hd-7850/
    The processor is 65W (5.4 amps @ +12V) at its max. The 32A +12V rail of the Corsair should be fine with that and any small stuff on the same rail. I ran that card and an Athlon II X 2 220 on a cheap Cooler master 460W PSU on a previous budget build and there were no issues. Your Corsair is a much better PSU.
  3. You do not want to see whats on my 300 watt power supply :)
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