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Faulty GTX680 or need new PSU?

Hi everyone,

Just got myself a new KFA2 GTX680 ltd OC version with the 1202mhz base clock and after installing it all I get it crashes when pushed. Ive only tried Valley, Heaven and Passmark benchmarks but I get a minute or two before I get freezes and crashes. My old overclocked 7970 had no issues. I own an Enermax Liberty 620w psu with 36a over the two 12v rails. Also have a i5 3570k stock, an ssd and a h80 watercooler if that makes a difference. Would that 2A make all the difference or is the draw on my system to great? Dont want to spend more on a psu if the card needs rma'ing. Is the recommended 550w 38a psu referring to the reference cards? Thanks
14 answers Last reply Best Answer
More about faulty gtx680 psu
  1. The min for a GTX 680 (Regular). is 550 Watt. Max load is 195 Watts. Then you have 85w~ for your Processor 100% then H80 Pump / Fan. Also your SSD.

    Power shouldn't be your issue. The extra fans arent going to add an additional 120w of usage. If possible try a different pc. IF not I would RMA. I don't have any experience with KFA2. Maybe another member can shed more light but to me it sounds like a bad GPU
  2. I doubt it is something to do with the PSU as you have enough amps to run it safely.
    I would check all the drivers again and look to see if your bios is the most upto date version.
    Another problem could be the PCI slot the GPU is in, you could try to put it other slots and maybe you will have some success.
  3. i had exactly the same problem turned out to be motherboard, changed motherboard problem was fixed
  4. I would test it on another system but I dont have access to one. Its strange as I literally took out my 7970, cleaned off all the drivers and then put the GTX 680 in and installed the newest drivers from nvidia. If it was the motherboard, would I not have had problems with my 7970?
  5. i go a bit more in depth with my issue and how i found out motherboard was the issue.

    when ever my hd7870 was under heavy load it would sometime lock up with a red screen or go back to desktop or totally re-set my pc some most game it worked fine only games or tests that stressed the gpu, i thought it was gfx card then maybe psu, but just out of luck my mate was selling his motherboard cheap which i bought fitted into my pc and the graphics card problem totally gone, after further looking at my old motherboard the heat sink on the motherboard northbridge was not fitted very well and was quite loose, so i concur that was the problem in the first place.
  6. hmm its hard to say really maybe it could be your psu, i was in same boat didn't want to spend money if it did'nt fix the issue, i almost bought a new psu but luckly i got another motherboard cheap just because it had the amd 890 chipset and the board i was using had the amd 880 chipset, so im glad i didn't buy psu as that would not of cured my issue ... i know what ya going through fella very frustrating to say the least.
  7. Anonymous said:
    i go a bit more in depth with my issue and how i found out motherboard was the issue.

    when ever my hd7870 was under heavy load it would sometime lock up with a red screen or go back to desktop or totally re-set my pc some most game it worked fine only games or tests that stressed the gpu, i thought it was gfx card then maybe psu, but just out of luck my mate was selling his motherboard cheap which i bought fitted into my pc and the graphics card problem totally gone, after further looking at my old motherboard the heat sink on the motherboard northbridge was not fitted very well and was quite loose, so i concur that was the problem in the first place.


    Seems to me an issue with your motherboard and probably was indeed your problem (north bridge getting too hot), but you havent included replacing the 7870 with a 680 like op did and thus leads me to believe your issue is completely different.

    Ollie, it does sound like the gpu is faulty but to be sure, check if there's an bios update for improved Pcie compatibility for your motherboard.

    Also double check you're using the right/ pci power connector ports (the red ones on the psu right?)

    Test the card in another computer if you can or try another psu.
  8. Thanks for the advice. Ive got an Asrock pro4-m motherboard with up to date bios. I not only had a fully working 7970 but only a week ago i tested my brothers reference GTX 670 so I could sell it for him. Had no problems. Regarding power leads, I have two red pcie leads but one is 6+2 pin, the other 6 pin, so I used the 6+2 pin and a twin molex to 8 pin adapter that came with the 680. Would that make a difference?
  9. Best answer
    Molex adapters are not recommended if the psu isn't capable but your psu outputs 22a per rail making it 44amps combined which is more than enough for the 680.

    http://www.extremeoverclocking.com/reviews/cases/Enermax_ELT620AWT_2.html bit of a review on it (this is your psu?) and it has does well, despite the fact it isnt one of the well known few brands im aware of.

    It could be the molex adapter, these things happen but having an spare psu (xfx/corsair/seasonic preferably, 600-650watt 46/54amps single rail from these brands) would help narrow possibilities a lot.

    Bottom line is either;

    Psu
    Molex cable
    Faulty Gpu

    Putting back your old card if you've done so already just to troubleshoot possible software/other hardware problems. If the computer works as normal like it has been then either the above 3. More likely Psu imo as the 680 draws more power than the 670 and 7970.
  10. Yeah that's my psu. Ive bitten the bullet and got myself a new 750w with 35a on each rail and 4 independent 6+2 pcie leads from a well respected national component seller down the road. I cant name as if this fails I will send the gpu back and return the psu and get an alternative gpu from them. If that fails then it would have to be something else! I'll find out in a few hours if it was the psu. Crossing my fingers!

    UPDATE
    The new psu makes no difference. Having a play with some settings using kfa2s xt+ oc tool I found it becomes stable if I underclock considerably. Also voltage appears to have a maximum of 1.150v. I guess that would mean I have a bad apple? Requested an RMA anyway and exchange. Hope the one left doesnt get sold as its end of line!
  11. might be worth looking at replacing with 770 instead if you're able to, essentially a higher clocked 680 and 100$ cheaper depending on the card. 770 has improved PCB, faster base, boost and memory clocks.
  12. boju said:
    might be worth looking at replacing with 770 instead if you're able to, essentially a higher clocked 680 and 100$ cheaper depending on the card. 770 has improved PCB, faster base, boost and memory clocks.


    I am considering doing that although I have no more to spend that what I got the 680 for as that was the top of my budget. That was £240 new. One of the only 770's with half decent cooling I can find for that is the Zotac 2gb which I'm not sure is a good card or not
  13. Zotac if thats your only choice isnt a problem at all.

    Quite a few positive feedback reviews at newegg: http://www.newegg.ca/Product/Product.aspx?Item=N82E16814500301

    Though if you can find yourself an Gigabyte they are one of the most reliable brands along with Asus and Evga of course, but i think personally Gigabyte has the underestimated edge of all.
  14. Just to update, after RMAing the card got an instant refund. The card wouldn't stay stable at the factory overclock! Thank you for all your help.
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