MSI R9 390 No Video & Fans Don't Spin Up

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rollingbarrels

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Oct 6, 2015
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Background:

About a week ago I built a computer out of the following parts:

Seasonic Snow Silent 1050W PSU.
MSI 990FXA Gaming Motherboard
AMD FX-8370E CPU
Phanteks TC14CS Heatsink
GeIL Black Dragon 8GB (2x4GB) DDR3 1600MHz RAM
MSI Radeon R9 390 Gaming Edition 8GB Graphics Card

I decided to do some overclocking and after about a week of fine tuning I was running a stable 4.5GHz on my CPU. However, during a stress test on Prime95 and despite the logs on Prime95 showing no signs of instability, my computer randomly shut itself off, the PSU making a loud click sound which I guessed was some kind of emergency shut-off mechanism (correct me if I'm wrong). The system then wouldn't power up at all unless the 8-pin CPU power connector on the motherboard was unplugged or the CPU was removed. After researching the problem online, I deduced that the motherboard was the culprit, so I got it replaced. Upon replacing my motherboard, the system does now power up like it should, however, now the GPU doesn't seem to be working at all.

Problem:

There is no display output, the fans on the card do not spin even on power up. I have made sure that the two PCI-E power cables are securely plugged into the card. The "msi" logo on the card lights up, but apart from that nothing else is functioning.

I tried running the card without the PCI-E power cables connected and the logo still lights up, which means that there is power from the motherboard going into the card. This leads me to think that the power from the PSU is not reaching the card, or the card has somehow gone defective after replacing the motherboard (or perhaps from the aforementioned shutdown incident). Is it possible that I damaged my PSU and now it does not supply as much power as it used to?

I would greatly appreciate any insight on this matter.

 
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greens

greens

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Jan 27, 2012
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I've had PSUs go out only on the 6+2 lines. It may have been a multirail PSU, never paid attention.
There isn't any switch or breaker inside of a PSU. At best it would be whats called a fuseable link. Once they go, they're gone. You could probably fix that but it wouldn't be safe and probably wouldn't even be worth the effort.

Trying a new PSU is your best bet.
And given that the Mobo behaved oddly with the CPU power before, i'm even more inclined to suggest you swap PSUs and retest.
 
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rollingbarrels

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Thank you for your reply.

The system was only able to boot again after I replaced the motherboard, so I thought that the motherboard was my only problem. Are you suggesting that the unexpected shutdown damaged both the PSU and the motherboard simultaneously, and that replacing the motherboard was only half the solution?

I was under the impression that careful overclocking would just make my system less stable at the most, I never thought it could turn out so catastrophically. Either way, I will probably take both my graphics card and PSU to get tested soon.
 
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greens

greens

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Naw, i'm saying your motherboard was never damaged at all.
You used a bad PSU to test it most likely, so while it seemed something with the mobo was wrong, it was actually the PSU failing to deliver CPU power properly.
It works now, simply could be that the 4+4 was plugged in differently? Could be a fluke.

Either way, a PSU that made noise, or failed in any capacity should be replaced. Its clear it isn't delivering power to your GPU. Getting it tested? Just swap it out. 1050 is major overkill... you could buy a 500W cheapo from a big box store just to test it out real fast.


 
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rollingbarrels

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Before I replaced the motherboard I tried unplugging the cables, plugging them back, making sure they were secure, using different cables, using different ports on the PSU, breadboarding, etc. and I could not get it to boot with the 8-pin connector plugged in, so I am very certain that the old motherboard was damaged in some way because after replacing it I was able to boot straight away without having to try all those things. But yeah, I will see about getting the PSU replaced.
 
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rollingbarrels

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Well, I was able to confirm that the PSU was not functioning properly and I had it replaced with a new one. However, my graphics card is still showing the same symptoms so I really have no idea what is wrong with my system now. The motherboard is brand new, the PSU is brand new and I tested the graphics card on another system and it worked fine. I've also tried booting the system with a different CPU installed, but still no success.

I have really run out of ideas at this point. Any help would be appreciated.

Update: It turns out that my CPU, PSU and motherboard were all the culprit, after replacing the CPU everything is back to normal now. Suffice to say that this has put me off overclocking for a long long time.
 
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