Trying to diagnose my issue.

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finngrace

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Jun 9, 2013
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I'm currently facing a recurring issue with my system. It doesn't matter what I do when I am using the computer, be it web browsing or gaming, my system will perform a form of crash.

Now here's the weird part. When it crashes, my monitors go blank, and my system still runs (i.e. doesn't turn off, but doesn't do anything). After performing a couple reboots, it starts up stating the regular "Start Windows Normally" prompt after an improper shutdown. I start it back up and check the Event Viewer for any errors or critical failures.

Zip. Nada. Nothing.

So I ask my buddies, and they seem to agree that it's either my power supply or my motherboard. I've checked my power readings, and all seems well. No odd drop-offs or ridiculous amount of voltage loss. I've checked my motherboard for blown capacitors, but nothing there too.

Any ideas?


Here are my system specs.

CPU: AMD FX-8350
RAM: 2x 4GB Corsair Vengeance LP 1600MHz
Motherboard: Gigabyte GA-990XA-UD3
SSD: 2x Intel 520 120GB
GPU: 2x MSI Nvidia GTX 660Ti Power Edition in SLI
PSU: Corsair AX860i
 
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CrazymanWO

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May 21, 2013
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Try to take SLI mode off and plug monitor into each gpu card. See if they are both working. What i suggest is play a music loop. When your monitor goes black see if its still playing the music. If it is then its deffintly one of your gpu cards. If not then you can rule GPU out and it could be the mobo. You try to reinstall windows? I doubt its your PSu unless its defective. I have same processor and mobo as you. HAve you checked your CPU temps?
 
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finngrace

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Jun 9, 2013
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Well, my GPUs aren't the issue. When the crashes happen, I lose all inputs and output but power; audio, video, keyboard, mouse, gamepad, etc. I'd rather not reinstall my OS, but I may need to load a RAID driver before installation of the OS for my RAID 0 setup...

At this point, it's either my motherboard or my power supply.
 
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davy rockstar

davy rockstar

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Mar 28, 2013
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sounds interesting....

did you built your pc??

i wold try to make some maintenance on it, try to clean fans, heatsinks, some video issues come from a dusty PCI-e port so i would recomend to pull the out and use compressed air to clean the ports...

the guy before me is right try to run the system W/O your GPU and see what happends...
do you know how to interect whith the bios, could be an issue of configuation aswell
 
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finngrace

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Jun 9, 2013
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I built this system myself, and I have a weekly maintenance schedule for it.

The routines include removing the GPUs from the system, blowing out all dust from the system (Heat sinks, PSU, GPUs, expansion slots, storage drive bays, filters, fans, etc.)

I've looked at some reviews that my PSU has gotten, and there seems to be some issues with them. Other than that, I had sent my motherboard out to be serviced about a year ago for a faulty BIOS chip and the backup BIOS was corrupted.

The only three issues I see at this point are:
a) My motherboard going faulty again
b) My PSU failing
c) My own mistake of not pre-loading an AMD RAID driver to Windows during OS installation, however I haven't had problems with it before.
 
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davy rockstar

davy rockstar

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Mar 28, 2013
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mmh... when did this issue appear?? beggins after a maintenance session?
(i wouldt recommend to pull in and out the GPUs so frequently)

i would try to check my MOBO before thinking in change the PSU

#edit# also if it where your PSU then your pc could work fine if you pull out the GPUs
conect the monitor cable into the conector within the MOBO, and see what happends
 
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finngrace

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Jun 9, 2013
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So, it looks like the problem was a flawed case design alongside excess load.

I found that my NZXT Phantom had a densely woven dust filter on the bottom of my PSU and was causing my PSU to overheat. I then decided to flip the PSU upside down so that it could get some air. It hasn't shut down randomly since then. I guess it was due to the excess load of the SLI setup mentioned in my posts above.

Thank you for helping me diagnose and fix this issue, guys. It means a lot.
 
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davy rockstar

davy rockstar

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Mar 28, 2013
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oooh so that was, when a psu is overheat the voltage it supplies beggins to be unstable, is called noise, if that noise is so out of range, the MOBO shoots down to prevent any major issue...

is good to know you find the anwer

 
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