Solved

Question about PSU.

I'm running a 2500K system with a single ASUS Radeon HD 6970 2GB. I currently am looking at the Antec HCG-900 900W PSU.

Is 900W over-kill? Or is it what I need?

I believe I am right in my assumption, given the reqs say the card alone is 400MHz. But what I am stumped on, is I plan to overclock my CPU as well as my card (Voltage Tweak capability). So will I be needing more?

EDIT: Well I read a couple reviews, did some math and the output is 890MHz on a single 12V rail. So....890/12 = 74 amps = 850W PSU? Still need clarification, cause I feel like I'm running circles around this...lol.
6 answers Last reply Best Answer
More about question
  1. Can anyone help me with this please?
  2. Best answer
    Yeah that's overkill!
    A 6970 uses about 200W max itself at full load.
    I don't think the rest of your gear requires 700w.
    A high quality 650W psu would be fine.
    750w max if it makes you feel more comfortable.= oc the cpu and gpu
    http://www.guru3d.com/article/asus-radeon-6970-directcu-ii-review/7
  3. davcon said:
    Yeah that's overkill!
    A 6970 uses about 200W max itself at full load.
    I don't think the rest of your gear requires 700w.
    A high quality 650W psu would be fine.
    750w max if it makes you feel more comfortable.= oc the cpu and gpu
    http://www.guru3d.com/article/asus-radeon-6970-directcu-ii-review/7


    Yeah 750W sounds like a good deal...just to be on the safe side. I am still trying to figure out his PSU calculating bs haha.
  4. Area85Gaming said:
    Yeah 750W sounds like a good deal...just to be on the safe side. I am still trying to figure out his PSU calculating bs haha.

    Yeah 750w's are a good solid investment and allow for greater flexibility gpu wise.
    Ya i agree psu calculators are pure BS now days.
    Back a couple of years ago they were much better(realistic)
    Now they're calibrated to upsell imo.
  5. Yeah I have used a couple of them and one would say 650W, one 900W, and one 1050W and I'm like wtf...

    Then I started looking around trying to figure out what I needed, which failed lol. Good thing is, Antec has the same PSU in a 750 :D. Which I'm going to.

    Thank you for your help!
  6. Best answer selected by Area85Gaming.
Ask a new question

Read More

Power Supplies Components