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2 x 780 gtx's both dead on arrivale

ldjg2002

ldjg2002

ldjg2002

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Joined
24 Jun 2012
Posts
28
So,

Brought two of these today for sli, neither of them seem to be working.

PC is hanging/or not even responding when i try either, my old gpu goes in (690) and its working fine.

It cant be possible to have this ammount of bad luck, any ideas on anything i could be overlooking?

1250watt XFX PSU, Z77-3DH M/B, 3770k, 32 gig of ram.

I cant think of anything ive done to **** it up installed many gpu's in the past. I tried both individually so haven't got to installing them in sli yet, its an RMA most likley but still would rather not have to bother with all that.

Cheers
 
Bought! No "r".

As suggested, update your motherboard's BIOS, it seems some GIGABYTE motherboards don't like new graphics cards without a BIOS update.
 
That would be extremely bad luck to have two cards completely dead :D I think following the steps other people have mentioned and updating your bios should resolve it. Seen the same issue in a few threads.
 
+1 for BIOS update
Also install latest chipset drivers and obviously the latest nVidia drivers.

You've got to be VERY unlucky to receive 2 duff cards.
 
The fact you have a gigabyte z77 motherboard tells me it's almost certainly a bios problem. As above, update to the latest beta.
 
Thanks for all the info so far guys.

Latest update, installed what I believe to be the latest bios using my 690 (only way it would boot)

(btw a link to the very latest would be appreciated to match against mine in case i've missed a new revision)

Bios was updated, restarted all was good.

So I shut it back down (properly)

And tried each of the 780's, and hello new problem, id start it up, it would run for 20seconds (no post), then shut down, then start on its own, and repeat.

Left it overnight, turned it on this morning with my 690 and it boots first time, but only for a min or two, then shuts down and repeats the process in my above paragraph.

I then restarted it again and went into the bios, my mouse and keyboard died on me but I could still see the cpu heat/frequency updating.

Starting to think it could be a duff PSU, as It will start up after a while each time then trips?
 
I had a similar problem of rebooting/shutting down etc with my GTX580, it turned out to be one of the psu cables was faulty, tried 2 others and everything is fine now, although I do have to check them now and again as they seem to work loose after a while (not having clips to hold them in place), even though I have re-rooted them so they are not bent over at the graphics card
 
gigabyte motherboards going in to a reboot loop usually means unstable overclock

the most recent bios on the website is F17f - 2012/11/21

if you've updated the bios it would have deleted your OC settings, so have you set them back up correctly?
I would in fact leave it on stock until you manage to get the 780's working correctly
 
Well the 780's are fine tried them on another system. im a happy man, thought id broke them somehow.

As of now i have removed the new 1250 PSU and replaced it with my cosair HX850, and its running fine so far with my 690(1 hr or so, and considering the other psu was rebooting after 5mins max im pretty sure its the culprit)

Ill leave it some more before im happy enough to do another bios flash, then ill do that and retry the 780's

Finally another noob question the sli bridge I have with the mobo is only a single width one, the 780s are double pin, do i need a different bridge?

And thanks again all, i really appreciate the help you lot have given so far.
 
A gigabyte board coming on and rebooting is a sign of a bad BIOS. What happens is the main BIOS is used and for some reason whether it be corrupt or bad overclock it tries to use the backup bios, now if this is also corrupt or has a bad overclock it cant use it so reboots and tries the first one again. It can also happen if the main bios is a different revision to the backup bios.

What probably happened is the above. The solution is often to leave your PC off for a while (and usually reset the CMOS) and as you changed PSU's this probably did the trick. Its also often blind luck that you can get into the main bios too.

What I would recommend is to remove any overclocks. Then force the main bios to do a backup to the 2nd bios. You may be able to do this in the BIOS pages I am not sure with Z77 but on Z68 you could press ALT & F12 to force the main bios to backup to the 2nd bios.
 
Are these problems on the UEFI's or older bios?

Either way I guess I've been lucky with my Gigabyte EX58-UD5 then, 780 slotted in there and ran straight away. Just as well really, I'm already on the lastest version and I don't think its supported any more.
 
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