Will a 500w psu for a gigabyte gtx 970 g1 be sufficient?

Discussion in 'Videocards - NVIDIA GeForce' started by sgraff1, Oct 31, 2014.

  1. sgraff1

    sgraff1 Guest

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    Sorry if this is on the wrong category, I am new here but...
    I've read that the Gigabyte g1 gtx 970 requires at least a 550w psu. I am currently using an EVGA 500B 500w psu and am wondering if 500w is sufficient enough for this graphics card?

    Here are my specs
    CPU: i7 4790k O'C @ 4.2ghz, @ 1.188v
    MoBo: Gigatbyte z97 DH3
    Cpu Cooler: Cooler master Hyper212 evo
    Ram: GSkill 4gbs ddr3 1866 ripjaws-x (2 total of 8gbs)


    I've done the online calculators, but they don't seem to listen any brand gpus, and I know that each brand (i.e Asus, EVGA) has a different psu requirement. According to overclocks dot net(they compared the asus strix, msi, and gigabyte cards) , the card uses combined max rated draw of 300w (75w pcie, 75w 6pin, 150w 8pin). I did the online calucator without inputing a gpu, and my minimum psu requirement is atleast 182w. Not sure if 500w is sufficient or even safe.
     
  2. Cyberdyne

    Cyberdyne Guest

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    I wouldnt do it. Doesnt make sense to take any risks like that with expensive hardware. Aim for 650watt or more, and a good 40amps or more on the 12v rail.
     
  3. Brogan

    Brogan Guest

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  4. sgraff1

    sgraff1 Guest

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    hmm, my evga 500b uses 40a on the 12v rail, and I have the card right now, and the box does say a minimum of 500w or greater. I don't plan to overclock the card that much. So you still don't think 500w is sufficient? How much power does this card even use?
     

  5. spider

    spider Guest

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    So at the moment you are running an 760 GTX with it.
    Why wouldn't be enough for a less power consuming 970?
     
  6. sgraff1

    sgraff1 Guest

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    yeah I am currently using a evga gtx 760
     
  7. clawhamer

    clawhamer Ancient Guru

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    More then likely you'll be fine, but personally I'd go with a quality 650w.
     
  8. sgraff1

    sgraff1 Guest

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    Could you recommend any? I was personally looking at the Antec HCG 620m psu
    . Tom's Hardware listed this as tier A psu, BUT, I will only get a new psu if my 500w evga 500b psu might potentially damage my psu (some guy at microcenter told me it can damage my gpu, but some people on different forums are saying that he was just trying to sell me another psu)
     
  9. szakh

    szakh Guest

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    My 500W fanless PSU is more than enough for my GTX780ti @1200Ghz, i7-4820k @4.4Ghz, 16Go Ram...
    I Never ever understood why single GPU user use none fanless PSU ? :) ... Love of noise ?? Maybe :D ...
     
  10. sgraff1

    sgraff1 Guest

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    Dude, seriously you're powering up a 780ti with a 500w?
     

  11. burebista

    burebista Ancient Guru

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    You have a good PSU (not stellar but not bad either).
    A GTX970 usually needs 180W during gaming.
    So playing games at stock speed will barely load your PSU at half of it's output.
    You can safely OC your rig and your PSU will be perfect fine.
     
  12. clawhamer

    clawhamer Ancient Guru

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    It can be done... is it a good idea ? time will tell. Once you start increasing the volts to reach higher overclocks, that's when things get sketchy fast.
     
  13. sgraff1

    sgraff1 Guest

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    Alright, so I am guessing that a 500w is fairly safe for this card then, I don't do any crazy overclocking I tend to do mild overclocks. I will mildly overclock my gpu, and hopefully this card will be fine.
     
  14. sgraff1

    sgraff1 Guest

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    [​IMG]

    Well in all honesty, I believe I can run this card w/out any problems with a 500w psu. Apparently you can, run a gtx 980 sli with just 500w. I am running a single gtx 970, so I believe I should be fine, unless anyone believes otherwise (I am not really familiar with wattages and stuff and you guys probably know wayy more than I do)
     
  15. burebista

    burebista Ancient Guru

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    That picture of yours is with total system power draw from the wall. That means the real system power draw from your PSU should be multiplied with PSU efficiency.
    In above picture for example assuming a 80% PSU efficiency then you PSU should deliver 312W AC x 0.8 eff = 250W DC.
    So we are at the same conclusion of mine, you barely need half of your PSU during games. :)
     

  16. sgraff1

    sgraff1 Guest

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    the system wattage in full stress for this gpu (gigabyte g1 gtx 970) is at 280 watts.

    http://www.guru3d.com/articles-pages/gigabyte-geforce-gtx-970-g1-gaming-review,7.html

    the reviewer also mentions that "the system wattage is measured at the wall socket side and there are other variables like PSU power efficiency."
     
  17. burebista

    burebista Ancient Guru

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    So we can agree that you can go and enjoy your new card. :D
     
  18. sgraff1

    sgraff1 Guest

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    one more question, did the reviewer use the formula that you just gave me (i.e 312w aw X .8eff) to get 280w? or do I have to do 280w aw X .8eff? sorry if this question is unclear or kinda stupid, i am just surprised and confused on why the gtx 980 is getting lower W dc.
     
  19. burebista

    burebista Ancient Guru

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    Depends on many factors man.
    Games/load used, system configuration, different PSU's with different wattages and efficiency, OC or not, measuring equipment and so on.
    That's why you'll never see same numbers on different reviews.

    Hilbert did the wall measurement so he measured the whole system draw from the wall.

    Again, you're good to go. Enjoy your new video card. :thumbup:
     
  20. Anarion

    Anarion Ancient Guru

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    OP, your PSU will work just fine.
     

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