Unexpected PC Shutdowns/Reboots...

faridc

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Dec 21, 2013
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I have been having some issues with my PC shuting down and rebooting itself and I have not been able to figure out the problem. The post is kinda long, but I wanted to provide as much info as possible so you can have an idea of what the problem might be.

First let me describe my current system configuration. I initially purchased an ASUS CM6730 from Best Buy that came with:
OS: Win 8.1
Mother Board: ASUS P8H61-M Pro
CPU: i7-3770 @3.40 GHz
RAM: 16 GB
GPU: GT 630
PSU: generic PSU that came with the build

The salesperson recommended I upgrade the GPU to a GTX 660 and the PSU to a Thermaltake TR2-600 W, because I told him I was going to use the PC for mainly gaming.
I got home and tried the new rig, I played World of Tanks v8.8 at ultimate settings and got max fps. I do not remember any time I was able to play any of my games with ultimate settings and ran that smoothly. I was amazed.

Then the PC started shutting down and rebooting itself while playing the game. I spent several days with Wargaming.net (developpers of World of Tanks), trying to figure out what the problem was, since the shutdowns started after a new game patch was released. A fresh game install was performed, I had even re-installed windows and the NVIDIA driver for the GTX 660. Wargaming techs walked me through different things to test my system, including FurMark to put some stress on my GPU, but could not replicate the problem. The shutdowns did not produce any BSOD and did not generate a .dmp file either. It was just the PC turning itself off then restarting.
I removed the GTX 660 and put back the original GT 630 (which does not have a 6 pin power supply) and the PC did not shut down while playing the game. Although I've been using much lower settings to achieve decent fps. I then contacted EVGA and then advised me to send the GPU back for an RMA.

While I was waiting for the RMA, it was suggested that the PSU might be the problem, so I upgraded the already upgraded PSU to a Corsair CX 750 M. I get the new GTX 660, install it, play the game and the PC shuts down again. This time when it restarted, the screen remained black and a message asked to plug the GPU to the power supply, which was plugged already. The new GPU lasted about 3 minutes while playing the game and then went out. So, I went back to Best Buy and purchased a Radeon R7 260 tried it and the PC did not shut down. I played the game at ultimate settings, but the fps was horrible...but it did not shut down!

EVGA has been gracious enough to grant me yet another RMA and while I am waiting for the new GPU, I purchased a new PC case with better airflow (Fractal mini R2, with several fans) in case it's a heat issue, but I have been monitoring the temps prior to upgrading the PC case and it did not seem the heat was an issue.

After spending quite a sum of money on 2 PSU's, a GPU, a new PC case...I am running out of patience and dollars! Any insight into my problem will be greatly appreciated.

 
Don't think I have any solutions; you seem to have tried everything one might have tried. And that narrows the problem down to possilbly the motherboard starting to fail or part has already failed.
The next step might be to contact Best Buy or ASUS re. possible mobo failure. Hopefully nothing you have done voided the warranty.
 

faridc

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Well, since I upgraded the PC case, I got rid of the original ASUS PC case. Transferring the mobo to a different case may have voided the warranty.
As far as mobo failure is concerned, everything else works fine, internet surfing, playing WoT with a lesser GT 630 GPU, word processing...etc
 

Doligic

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Jan 10, 2014
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I had a very similar issue but it ended up being the PSU which doesn't sound like your problem unless you keep getting duds =/. Are you on the latest bios for your motherboard?

Also, I have never heard of transferring your motherboard to another case voiding the warranty unless you popped a cap off when transferring :p
 

faridc

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I purchased the ASUS PC and it came with it. The mobo was not purchased separately, so it was not registered with ASUS as such, but as a whole PC. Usually once you open the case and break that seal, the warranty is void.
As far as PSU's are concerned, wouldn't it be unlikely that 2 different PSU's from 2 different manufacturers be both defective?

However, if it turns out to be the mobo that's not right, I will probably spend yet more money and get a new and different one. I'm not going to get a new CPU, cause I think the one I have is good enough. So I have been looking at the ASUS P8Z77-M Pro, which has an LGA1155 socket similar to my current P8H61-M Pro and just move my i7-3770 CPU to the new board.

But before I do that and open my wallet again, I'd really like to know what the issue really is.
 

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