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Do I have enough power supply to support crossfiring?

I am crossfiring the Radeon HD 7950 cards and I want to know if I have enough supply of power for to support it

Link to GPU:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814125414

Link to Power Supply:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139020
18 answers Last reply Best Answer
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  1. Best answer
    TX is a good PSU and that wattage is pretty nice, but I'd recommend you get HX 750 instead, for the CFX setup with those two particular GPUs. They are quite power-hungry and you would need that little extra.
  2. Barely. What you lack are enough plugs to power both cards. Might want to upgrade the PSU to something that was intended to power two dual 6pin PCIe plugs. I think two 7950s stock are looking to pull 400W just for them. You should be looking at around 550W for the complete system with no OCing. You've got 636W on the 12V rail on your PSU so you should be ok. You just don't have enough plugs.
  3. master_chen said:
    TX is a good PSU and that wattage is pretty nice, but I'd recommend you get HX 750 for the CFX setup with those two particular GPUs. They are quite power-hungry.


    Yeah thats what my friend recommended as well, just wanted to check around here.

    Thanks!
  4. Ok 474 but where should I get extra plugs? or should I just run one card?
  5. I really wanna do 2 though if I can.. can you give me the link to thing I need or something of the sort?
  6. flamehead269 said:
    Where should I get extra plugs?


    Just get that HX 750, man. It has everything you need. :\
  7. I would invest in a powerful PSU for crossfiring those GPUs, something like this:

    CORSAIR HX Series HX850 850W ATX12V 2.3 / EPS12V 2.91 SLI Ready CrossFire Ready 80 PLUS GOLD $159
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139011

    SeaSonic X Series X-850 (SS-850KM Active PFC F3) 850W ATX12V v2.3 / EPS 12V v2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Full Modular $169
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817151102

    Do not cheap on your PSU you will regret it in the long run
  8. OK so this has the double plugs I need?
  9. The 1st one I linked has 6 PCIe plugs and the 2nd one has 4 PCIe plugs
  10. avenseth12 said:
    I would invest in a powerful PSU for crossfiring those GPUs, something like this:

    CORSAIR HX Series HX850 850W ATX12V 2.3 / EPS12V 2.91 SLI Ready CrossFire Ready 80 PLUS GOLD $159
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139011

    SeaSonic X Series X-850 (SS-850KM Active PFC F3) 850W ATX12V v2.3 / EPS 12V v2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Full Modular $169
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817151102

    Do not cheap on your PSU you will regret it in the long run



    Yeah I am definatly aware of this guys, as this is why I asked, heres what I went with

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139010&Tpk=HX%20750

    Yeah this is really what I need right here, perfect
  11. avenseth12 said:
    I would invest in a powerful PSU for CFXing those GPUs, something like Corsair HX850 or Seasonic X-850.


    850W is an overkill for his setup, man. He will be absolutely fine with just HX 750, even in a long run, for a long time.


    flamehead269 said:
    This has the double plugs I need?


    The GPUs you decided to buy need two 6-pins each, that's four 6-pins. HX 750 has four 6+2 pin cables. Exactly the number you need, nothing less or more than what you just need.
  12. master_chen said:
    850W is an overkill for his setup, man. He will be absolutely fine with just HX 750, even in a long run, for a long time.


    this has the double plugs I need?


    Agreed
  13. That PSU should be fine. That is a real nice one also. That PSU has 4 PCIe connectors which is good because each of those cards will take 2 to power them.

    I just find that having more power is always good, as the PSU is the heart of any system. Alot of people's builds fail because they are underpowered.
  14. And a lot of peoples computers on this site seem to be overpowered. You didn't need to buy a PSU anywhere near that powerful. I said 550W and people suggest 850W PSUs? Way more then needed.

    You'll be fine with that PSU. You just spent more then you needed to.
  15. 4745454b said:
    You'll be fine with that PSU.


    Exactly. HX 750 would be more than enough for him for a long, LOOONG time.
    It's the golden middle: it's not an overkill, but also doesn't cap with his desired setup, has just that exact number of cables he needs and has golden-level efficiency to the boot.
    You can't beat that for top-notch CFX setup with such GPUs. It's also future-proof, because it has 6+2 pin cables, and thus he can easily use this PSU if he upgrades to 8-pin GPUs.
    It's a PURRFECT PSU for him.
  16. Yeah, 750w is sufficient for most rigs. Corsair makes good psus for the most part, but I would go with one from Seasonic though (they actually manufacture many of Corsair's psus).
  17. Yeah, 750w is sufficient for most rigs. Corsair makes good psus for the most part, but I would go with one from Seasonic though (they actually manufacture many of Corsair's psus).
  18. Best answer selected by flamehead269.
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