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ATI HD7770 + Seasonic power supply 750W

Hi All, Just joined!!! :)
I am upgrading my PC and I have already bought a new motherboard M5a99fx pro r2.0.
My CPU is phenom ii x4 955 black edition and Corsair 4 GB ram.
My question is i m really intereested in buying HD7770 (an upgrade to my current 5770), but i heard it needs an auxiliary psu. My current PSU is seasonic 750w 80 silver.

Will it be enough, or do i need to invest in an auxiliary PSU? Thanks in advance
12 answers Last reply Best Answer
More about ati hd7770 seasonic power supply 750w
  1. It is more than enough.
    If you can afford it, then you could get a much stronger GPU in that PSU.
    In fact, you can fit 2 titans in that PSU.
  2. You could run 3, maybe 4 HD7770s. :D
  3. Novuake said:
    You could run 3, maybe 4 HD7770s. :D


    Actually, 6.
  4. cst1992 said:
    Novuake said:
    You could run 3, maybe 4 HD7770s. :D


    Actually, 6.


    Not if you consider the rest of the system. But maybe.
  5. Measured power consumption R7770
    1.System in IDLE = 155W
    2.System Wattage with GPU in FULL Stress = 231W
    3.Difference (GPU load) = 76W
    4.Add average IDLE wattage ~10W
    5.Subjective obtained GPU power consumption = ~ 86 Watts

    Radeon HD 7770 - On your average system the card requires you to have a 450 Watt power supply unit.
    Radeon HD 7770 Crossfire - On your average system the cards require you to have a 550 Watt power supply unit as minimum.

    So you are fine to go, don't worry. And Seasonic is a solid PSU. You can increase RAM to 8GB will help on games.
  6. cst1992 said:
    It is more than enough.
    If you can afford it, then you could get a much stronger GPU in that PSU.
    In fact, you can fit 2 titans in that PSU.


    Wow!! Thnks for the quick reply. I know this needs another post but if you can please suggest any other GPU better than the HD7770 that I am intending to buy in or about the same price range. That woul be great!! :)
  7. Best answer
    If you are planning to game at 1080p then I would suggest you get at least an HD7790 2GB or a GTX650 ti Boost 2GB.
  8. Thanks for all your answers,really appreciate. :)
  9. No problem. :)
  10. Upgraded my 5770 to a 7770 some time ago (I killed it lol) and its not bad at 1080p, 7790 is better no question :)
  11. I have decided to buy AMD Radeon HD 7790 1GB. 2 GB is expensive for me :(
  12. shijin13 said:
    I have decided to buy AMD Radeon HD 7790 1GB. 2 GB is expensive for me :(

    It'll do you just fine.
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