GPU Failure; No boot with GPU installed; sudden

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Nohbdy820

Commendable
Jan 19, 2017
12
0
1,510
So, first things first:
i5-3550, 8gb Ram, CX600 PSU(tested and working), RX 580

I was using my computer, launched a game, and while still on the menu, the whole computer turned off. As if I pulled the plug. The monitors were still on, so I knew the power from the wall was fine. When I tried to turn the PC back on, it wouldn't. After opening it, I could notice that when attempting to boot, the system fan and CPU fan twitched, but didn't spin.

I started by removing the GPU, and then attempted to boot. It worked. I put in my old GPU, which uses a single 6pin(vs the 8pin of RX 580), and the computer could boot.
If i remove the 8pin, it can still boot, and it shows the red LED on the GPU for no ext. power. If i do it vice versa, with the power plugged in, but not inserted into the PCI-E slot, it wont boot(unlike my old GTX 750 ti)

Unlike if a fuse, or something similar blew, there is no(at least noticeable) burnt smell.

The GPU is relatively new. I have not overclocked it. I can't open it up to look for physical signs of failure. I've had no previous issues with it. I have no idea what might have caused this issue.

Thanks for any help,
-Nate
 
Solution
panathas
The fact that the GTX 750ti is working doesn't really mean anything because it draws a lot less power from the PSU. In fact the RX 580 draws 3x more power than the GTX 750ti thus it stresses the PSU a lot more. So a bad/damaged/unreliable PSU could easily handle the 750ti but not the RX580.

Only if you somehow manage to install on your system, an RX 580 (or another GPU with similar power consumption), you can draw conclusions about your PSU's condition but since this is difficult (or dangerous if your PSU is bad), you have to test your GPU on another system with a capable PSU or/and install another PSU on your system and then test your GPU.

Now if I were to guess I'd say it's 60% a bad PSU, 25% a bad GPU and 15% a bad PSU that also...
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panathas

panathas

Splendid
Feb 12, 2014
1,108
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30,315
The PSU is probably bad not the GPU. The corsair green CX units are notoriously bad. Also you shouldn't have plugged the 8-pin power cable to the GPU while being out of the PCIe slot. You could very easily kill it especially if you have a bad or unreliable PSU. Your old GPU worked because it uses a lot less power than the RX580. In fact a lot of GTX 750ti cards don't have a 6-PIN power plug because they can draw all the power they need from the PCIe slot. So what you should do right know is:

1)Test the RX580 into another system that has a PSU that is able to properly support it. If the card works then it is fine and your PSU is bad.
2)Test your system (and GPU) with another good and reliable 500W+ PSU. If it works, your PSU is definitely bad.

Finally you should know that if your PSU is failing it could damage or kill the GPU, since those old corsair units aren't reliable.
 
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N

Nohbdy820

Commendable
Jan 19, 2017
12
0
1,510


I've been starting to think that. But the fact that my GPU doesn't work point to the suggestion that it is fried. I did look up about how the CX series is unreliable, but after testing the other card, I thought differently. I was kinda thinking that if the PSU is screwed, then I wouldn't still be able to use it.

I don't have another PSU with an 8pin connector, so I'm gonna have to borrow a friend's in the next week.

You are kind of hinting that the card is fine, just the PSU is messed up. That doesn't make sense to me, but I really hope so.

(I'm using the CX600 to post this with my 750ti lol)
The CX600 is brand new; I got it for the RX 580, so if it did fry the card, I should be able to get something back.

Thanks for the quick (and actually helpful) reply
 
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panathas

panathas

Splendid
Feb 12, 2014
1,108
16
30,315
The fact that the GTX 750ti is working doesn't really mean anything because it draws a lot less power from the PSU. In fact the RX 580 draws 3x more power than the GTX 750ti thus it stresses the PSU a lot more. So a bad/damaged/unreliable PSU could easily handle the 750ti but not the RX580.

Only if you somehow manage to install on your system, an RX 580 (or another GPU with similar power consumption), you can draw conclusions about your PSU's condition but since this is difficult (or dangerous if your PSU is bad), you have to test your GPU on another system with a capable PSU or/and install another PSU on your system and then test your GPU.

Now if I were to guess I'd say it's 60% a bad PSU, 25% a bad GPU and 15% a bad PSU that also fried the GPU. Good luck and post back the result of your experiments.
 
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Solution
N

Nohbdy820

Commendable
Jan 19, 2017
12
0
1,510

Finally able to test the GPU in a friend's system after Christmas break...
The GPU is dead, except for the red LED when the 8pin isn't connected. I'm pretty positive that the PSU did it, so I'm filling out a Ticket to Corsair's support page. I can't really think of a reason that the GPU is bad that isn't the fault of the PSU, as it was working well for 3 weeks.

Thanks for the advice.
 
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