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Will I need a better power supply?

Hi, I'm currently running this:
i5-2500k @ 3.3 Ghz CPU
4GB DDR3 RAM
1 x DVD Player
AMD Radeon 7770 HD Graphics Card
ASUS P8Z68-V LX Motherboard
600W XFX Power Supply

I'm considering upgrading and buying a second AMD 7770 and running them in crossfire. Am I going to need to upgrade my power supply as well?
Thanks
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  1. Hi :)

    Yes....

    All the best Brett :)
  2. No, not nearly, that card pulls 80w at full bore. XFX units are not the best but I have no idea why anyone would recommend getting anew one.
  3. cuecuemore said:
    No, not nearly, that card pulls 80w at full bore. XFX units are not the best but I have no idea why anyone would recommend getting anew one.



    Hi :)

    Crossfire ???

    All the best Brett :)
  4. http://www.legitreviews.com/article/1854/2/ This review states amd claimed a 600w power supply with 2 6pin adapters was the minimum for a crossfire 7770 setup. That's cutting it close in my opinion. You might try something like http://www.newegg.com/Product/Product.aspx?Item=N82E16817139021 to be on the safe side.
  5. the 7770 doesn't draw much power at all. each card draws max of 80w. 600w is much more than enough for 2 7770s.

    http://www.techpowerup.com/reviews/HIS/HD_7750_7770_CrossFire/21.html

    a 400w psu can run 7770s in crossfire.


  6. less than 400w on a system with a much more power hungry cpu.
  7. Atomichearse said:
    Hi, I'm currently running this:
    i5-2500k @ 3.3 Ghz CPU
    4GB DDR3 RAM
    1 x DVD Player
    AMD Radeon 7770 HD Graphics Card
    ASUS P8Z68-V LX Motherboard
    600W XFX Power Supply

    I'm considering upgrading and buying a second AMD 7770 and running them in crossfire. Am I going to need to upgrade my power supply as well?
    Thanks

    XFX doesn't provide a 600 watt psu, 550, 650 and 750 watt versions are available.
    Even the 550w would be sufficient for your system specs
  8. Best answer
    For a system using two Radeon HD 7770 graphics cards in 2-way CrossFireX mode AMD specifies a minimum of an 600 Watt or greater power supply. The power supply should also have a combined +12 Volt continuous current rating of 30 Amps or greater and have at least two 6-pin PCI Express supplementary power connectors.

    Total Power Supply Wattage is NOT the crucial factor in power supply adequacy determination!!! Total Continuous Amperage Available on the +12V Rail(s) is the most important factor.

    Since you don't really have an 600W PSU:

    The XFX 550W PSU, with its combined +12 Volt continuous current rating of 44 Amps and with two 6-pin and two (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with two Radeon HD 7770 graphics cards in 2-way CrossFireX mode.

    The XFX 650W PSU, with its combined +12 Volt continuous current rating of 53 Amps and with two 6-pin and two (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with two Radeon HD 7770 graphics cards in 2-way CrossFireX mode.


    Since your power supply must be one of the following:

    The Corsair Builder Series CX600 V2 (CMPSU-600CXV2), with its combined +12 Volt continuous current rating of 40 Amps and with two (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with with two Radeon HD 7770 graphics cards in 2-way CrossFireX mode.

    The Corsair Gaming Series GS600 (CMPSU-600G), with its combined +12 Volt continuous current rating of 48 Amps and with two (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with with two Radeon HD 7770 graphics cards in 2-way CrossFireX mode.
  9. Excuse me, I put the wrong brand. XFX is the brand of the 7770 that I bought. The power supply is Corsair.
  10. Corsair is a really good brand of psu. That being the case, i would say stick with what you have.
  11. Ok thanks. If I were to stick with my current PSU and buy the second 7770, how much headroom would I have for other future increases in power usage like overclocking or another hard drive?
  12. Best answer selected by Atomichearse.
  13. Atomichearse said:
    Ok thanks. If I were to stick with my current PSU and buy the second 7770, how much headroom would I have for other future increases in power usage like overclocking or another hard drive?


    Atomichearse said:
    Excuse me, I put the wrong brand. XFX is the brand of the 7770 that I bought. The power supply is Corsair.

    Don't know which 600w you have, CX ( 40a ) or GS ( 48a ) , either will power a Crossfire 7770 system, with plenty of room for overclocking and extra HD's
  14. Intel Core I5 3.30GHZ
    4gb Kingston Ram
    ASUS P8Z68-V LX Mother
    1 x DvD Player
    ASUS GTX 560 Ti DirectCU II TOP
    500GB HardDrive
    600w Silverstone


    I'm considering buying a Water Cooler(KU3-241) It say only 10.8w needed. Should i upgrade to better power supply?
    Thank
  15. amd raedon 7770 need a 650W psu to run in crossfire mode,check out the amd official site for full specs
  16. sourodip said:
    amd raedon 7770 need a 650W psu to run in crossfire mode,check out the amd official site for full specs

    I don't know what you're looking at.

    The official AMD Radeon™ HD 7770 GHz Edition - System Requirements tab page clearly shows:

    • 600W power supply (or greater) with two 75W 6-pin PCI Express power connectors recommended for AMD CrossFire™ technology.

    http://www.amd.com/us/products/desktop/graphics/7000/7770/Pages/radeon-7770.aspx#3
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