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GIGABYTE GTX770 is causing my PC to restart

Last response: in Graphics & Displays
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July 1, 2013 7:30:54 PM

Hello guys. I just got my PC upgraded and I am experiencing a somewhat huge problem. My specs are :
MOBO: GIGABYTE PH67-UD3
VGA: GIGABYTE GTX770 OCed
CPU: i5 2400 @ 3.1 GHz
RAM:8GB
PSU: Inter Tech FP-750W

So,here's the deal. Previously I had a GTX460 2GB VRAM and I told my PC-guy to leave it in the box at the 4x PCI-e (and put the 770 on the 16x PCI-e) for the sole purpose of using it as a Dedicated PhysX Card which seemed better than dumping it so that my 770 wouldn't have to worry about the PhysX thing. So I got my pc,everything was smooth and then I started a game,Mafia II (not that graphic intensive),and at the point where an explosion happens my PC just restarted. Open it again and the PC restarted at the same point. So I opened the case,removed the 460 and opened the game again. It got past that point without any problems but a couple of hours later at a another point in the game the pc just restarted again. I changed the drivers from the 320.49 WHQL to the beta ones and it happened again. I reverted back to the 320.18 and,you guessed it,it happened again. Same goes for the 320.08 driver that came with the card's disk.I'm kinda lost here so any help would be awesome.I believe it has something to do with the 770 because I had no problems with my 460.


Thanks in advance,George.

P.S.: I also downloaded that RealTemp program and saw that my CPU's temperature was normal as was my GPU's. And then I opened MSI Combustor and run the 1920x1080,which is my native display,preset and the pc restarted as soon as the tesselated sphere came up.
July 1, 2013 7:47:48 PM

giorgos123 said:
Hello guys. I just got my PC upgraded and I am experiencing a somewhat huge problem. My specs are :
MOBO: GIGABYTE PH67-UD3
VGA: GIGABYTE GTX770 OCed
CPU: i5 2400 @ 3.1 GHz
RAM:8GB
PSU: 750W

So,here's the deal. Previously I had a GTX460 2GB VRAM and I told my PC-guy to leave it in the box at the 4x PCI-e (and put the 770 on the 16x PCI-e) for the sole purpose of using it as a Dedicated PhysX Card which seemed better than dumping it so that my 770 wouldn't have to worry about the PhysX thing. So I got my pc,everything was smooth and then I started a game,Mafia II (not that graphic intensive),and at the point where an explosion happens my PC just restarted. Open it again and the PC restarted at the same point. So I opened the case,removed the 460 and opened the game again. It got past that point without any problems but a couple of hours later at a another point in the game the pc just restarted again. I changed the drivers from the 320.49 WHQL to the beta ones and it happened again. I reverted back to the 320.18 and,you guessed it,it happened again. Same goes for the 320.08 driver that came with the card's disk.I'm kinda lost here so any help would be awesome.I believe it has something to do with the 770 because I had no problems with my 460.


Thanks in advance,George.

P.S.: I also downloaded that RealTemp program and saw that my CPU's temperature was normal as was my GPU's. And then I opened MSI Combustor and run the 1920x1080,which is my native display,preset and the pc restarted as soon as the tesselated sphere came up.


Hi - what is the brand & model of the PSU?
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July 1, 2013 7:56:38 PM

It's the InterTech FP-750W High Energy Power Supply.Updated the original post too.
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July 1, 2013 8:21:19 PM

giorgos123 said:
It's the InterTech FP-750W High Energy Power Supply.


Hi again - Your issue might be the power supply. That Intertech 750 has only
46amps on the +12v rails, which indicates it is old design having a lot
of amps on the 3.3v & 5v rails (28a on each) which aren't used much by
todays components. 46a on the +12v is enough (recommended 42a), but
it is conceivable the PSU is not delivering it's rated specs, espeicially it not
being in realhardtechx psu database or the eggxpert tier psu rankings.

http://www.realhardtechx.com/index_archivos/Page541.htm

http://www.eggxpert.com/forums/thread/323050.aspx

Any way to try the 770 in another PC to rule it in or out as the cause?
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July 1, 2013 8:32:59 PM

No, not really. I don't own another PC and I can't use another one right now.
Is there anything else I can do to narrow down the problem's cause and blame it on the PSU?
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July 1, 2013 8:36:42 PM

giorgos123 said:
No, not really. I don't own another PC and I can't use another one right now.
Is there anything else I can do to narrow down the problem's cause and blame it on the PSU?


Nothing else comes to mind. I suspect that it's the PSU, but without testing the 770 in
another machine, there's no way of knowing if it's bad or not.
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July 1, 2013 9:20:51 PM

I have been messing around with my case the past hour and I noticed something. Thecoloured cables that begun from the PSU and ended in a black adapter-thing that went into my GPU. There were two of these adapter-things. One with 6 cable slots and one with 8. The one with the 6 had a cable missing? So I took it out and I put in its place another one that was hanging there alone with 6 slots too that were all full. Thing is the problem is solved,I can get into the benchmark without any probs and I believe the same will happen for the games. Only thing that worries me is that the cables that were on the first adapter were multi coloured while the cables of the adapter that I now connected were black and yellow. Is there something to worry about? No weird sounds,no abnormal temps.
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July 2, 2013 2:12:55 AM

What I am really saying here is that I replaced the 6-pin that was already on my card with another spare one.
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Best solution

July 2, 2013 6:37:37 AM

giorgos123 said:
What I am really saying here is that I replaced the 6-pin that was already on my card with another spare one.


No need to worry. Looks like you had a bad pcie cable, and the replacement solved
the problem. It should only connect properly, so you don't need the colors to identify
ground,power, etc.

Had a similar issue with the monitor I'm using, colors were way off. Tried it on another computer
it worked fine, I had a bad cable.
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July 2, 2013 7:49:58 AM

Guess that was it. Anyway thanks for the help man :) 
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July 2, 2013 12:06:48 PM

giorgos123 said:
Guess that was it. Anyway thanks for the help man :) 


Gr8 - enjoy your new GPU.
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