Installed GTX 980 into system, restarts whenever it is used

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Snickel

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Aug 9, 2017
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Heyo, so i replaced an R9 270x from my system with a GTX 980 and now whenever i try to play games for extended periods, my system just flat out reboots. It also does this when i try to run userbenchmark, it runs fine up until the gpu benchmark, then it immediately reboots. I'm unsure if this is an issue with the GPU or the PSU, because im able to run things for a little while before the restart happens. There was a little bit of confusion with the PSU cables during the install, the 980 requires two 8 pin connections, but in the PC i removed it from, it was being powered by one 2 x 6pin cables to two 8pin connectors. I'll include a picture to show what i mean. Any input is appreciated.
Here are my specs:
Intel i7-7700k
8GB hyper x fury RAM
zotec GTX 980
750W PSU
http://imgur.com/a/dVve6 <- link to the picture i mentioned
 
Solution
bignastyid
My guess would be that rats nest of adapters. The psu lacking the proper connectors is usually a good sign you need a newer and or better psu. The Zotac Amp Extreme is going to use more power than a stock 980 and is also going to be finicky about voltage regulation.
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Greasy Pommel

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Dec 12, 2015
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Do you experience the crash while gaming too? It could be bug in the software.

The extra 2 pins on an 8 pin connection are grounds (for safety) and don't help deliver more power to the graphics card. Using adapters shouldn't cause issues. To make sure that it's not the PSU, try to run your 270X again if you still have it. If it doesn't work, it's probably your PSU. The wattage is fine, but there may be something wrong with the power delivery. If it does work, it must be the graphics card. In that case, I would suggest returning it to stock settings if you haven't already and reducing the power limit on the card through an overclocking utility to see if the PSU can deliver at least some power. If none of that helps, I'd try swapping the connectors.
 
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maxalge

maxalge

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May 31, 2012
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not enough power


each 8-pin is rated for 150w


6-pin is rated at 75w

if the psu does not have at least two 6+2 pcie cables its junk that most likely cannot deliver rated wattage


make and model of the psu?
 
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Greasy Pommel

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If it worked fine with the 270x, it should work fine with the 980 too. They consume the same amount of power.
 
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Greasy Pommel

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I'm not the OP, just saying that the PSU is unlikely to be the problem. The card is getting all the power it needs, 75 w from the motherboard, 150 from the psu assuming it's not broken. Even low end power supplies rated at 750 w are able to support the system he's trying to run.

One variable changed: the graphics card. Now the system isn't working. The problem lies in the changed variable, not the constant. Might need to be reseated.
 
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bignastyid

bignastyid

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My guess would be that rats nest of adapters. The psu lacking the proper connectors is usually a good sign you need a newer and or better psu. The Zotac Amp Extreme is going to use more power than a stock 980 and is also going to be finicky about voltage regulation.
 
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Solution
maxalge

maxalge

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May 31, 2012
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psu is VERY likely the problem

the card requires dual 8-pin

150w alone is not enough obviously, added to fact that he is using adapters = shit psu to begin with



"Even low end power supplies rated at 750 w are able to support the system he's trying to run."

NO, some cheap ass "750w" psu's are actually -IF YOU ARE LUCKY- 300w with nice stickers

NEVER assume a cheap psu can deliver rated wattage, especially if it lacks the proper number of pcie cables
 
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Greasy Pommel

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150 watts is not enough, but 225 is
 
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Greasy Pommel

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The motherboard delivers 75 watts through the PCIE slot. Obviously it's originally from the PSU, but if it's not able to deliver enough power to the 980, idk how it was able to power a 270x because like I said, they consume roughly the same amount of power.

Like I said, MAYBE it's the PSU, but personally I think the issue lies somewhere else. To check if the PSU is the problem, lower the power target of the graphics card. If that fixes it, you know that the PSU is the problem. If it doesn't then it's something else.

It's better to troubleshoot to find the problem this way than to order a new PSU, wait for delivery, re assemble half of the system, and still have the off chance of this change mot solving the problem.
 
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