Unknown Reason Causing PC to Shutdown - Extensive Research and Hours of Work have not Solved this Problem

lax_bro12

Commendable
Jul 18, 2016
4
0
1,510
Hello,

My computer has been shutting down on it's own for several weeks now. The case is an older HP case which has a proprietary power switch pin, which is not compatible with the GA mobo, so I have to use the PSU switch to power the PC on and off. It's common for it to shutdown while I'm playing games and on chrome. It also shuts down after I close applications. The temperatures on the CPU cores never seem to go above 40C and the GPU never goes above 50C.

I have tried many of the things posted on these forums, but to no avail. I have cleaned dust out of the components, I have made sure RAM is completely in the socket, checked the PSU, checked memory with windows memory check, and went on speedfan to check voltages and temperatures.

I have concluded that this is possibly a Memory issue (not sure which kind), a CPU issue, or a Motherboard issue.

My components:
Nothing has been overclocked.

CPU: AMD FX 8320 @ 3.5GHz - stock cooling
PSU: EVGA 600B watt
Motherboard: GA 78lmt-usb3
GPU: GT 740 FTW
8GB RAM

The PSU, CPU and Motherboard are all within 5 months old. I have also gone into the BIOS to check temperatures and voltages, but the motherboard won't let me underclock the CPU to reduce temperature, and it won't let me lower CPU voltages. The motherboard only allows me to have voltages of 1.5-1.9.

I went onto speedfan and the charts showed that the DRAM is at 2.2V. I cannot lower the voltage of the DRAM in the bios either.

So this problem has been very hard to detect. I think it is either the CPU, memory, motherboard, or GPU. I heard the FX 8320 overheats with the stock cooler but I'm not sure if that's the issue. This motherboard does have a feature however that will shutdown when there's overheating to prevent damage.

I have used MSI afterburner before, but if I'm correct, the profiles don't save so I don't believe the GPU is overclocked. I have tried MSI afterburner while playing games before and they always crash.

I also checked beep codes but am not sure which code it's signalling. AWARD beep codes indicate that I either have a DRAM refresh failure, Parity failure, CPU overheating, or problem with GPU.

Help for this would be very much appreciated as I have spent hours trying to figure this out.
 
Solution
How did you diagnose the PSU and determine it wasn't the culprit?
When the PC crashes, it just goes black right? Straight up just turns off all together. This means that Event Viewer probably isn't going to have any info for us, other than the loss of power.


If it were your Mobo, you would fail to POST
If it were your CPU, you would fail to POST
If it were your RAM, you would get BSOD
If it were your HDD, you would get BSOD or boot failure.

If it were your PSU, you would get intermettint difficult to replicate and hard to track down problems, almost no notification from the PC regarding errors, you would get no beep codes or lights or any real sign of problems.

To me, the clear answer is to blame the PSU. Is there any way you can...
How did you diagnose the PSU and determine it wasn't the culprit?
When the PC crashes, it just goes black right? Straight up just turns off all together. This means that Event Viewer probably isn't going to have any info for us, other than the loss of power.


If it were your Mobo, you would fail to POST
If it were your CPU, you would fail to POST
If it were your RAM, you would get BSOD
If it were your HDD, you would get BSOD or boot failure.

If it were your PSU, you would get intermettint difficult to replicate and hard to track down problems, almost no notification from the PC regarding errors, you would get no beep codes or lights or any real sign of problems.

To me, the clear answer is to blame the PSU. Is there any way you can get a replacement, just to test things out on?
 
Solution

lax_bro12

Commendable
Jul 18, 2016
4
0
1,510


Unfortunately I don't have another PSU with enough wattage to test it.

The thing that's so miraculous to me is that the PSU is 5 months old, and I had to buy that one because the last GPU went bad.
 

lax_bro12

Commendable
Jul 18, 2016
4
0
1,510




I believe the PSU is the problem. It just shut off on me again and it didn't even try to power cycle.
 

Oweennn

Commendable
Aug 19, 2016
5
0
1,510
I have pretty much the exact same problem. I got my PC upgraded last week, and whenever I play games it crashes.

The first game i tried when i got my upgraded PC back was H1Z1 and i instantly put the settings in high, it got on average 100fps and was smooth. I then went on to DayZ and did the same, i got around about 80fps on high. I then proceeded onto CSGO and put them settings in high, and i was getting around 300fps. But every time i looked at a smoke in CSGO my PC would instantly restart, no warning..
After multiple attempts at trying to figure out what was wrong with it, i decided to give it a break and go on H1Z1. But more problems where to follow. For some reason, when i then went onto H1Z1, as soon as i spawned into the server, my computer restarts. it does it every time and i have no clue why. I managed to mess with some settings on csgo (Vsync/tripple buffering + max fps 160) but that only reduced the amount of times it happened on csgo but it still restarts sometimes.

I just don't understand how a computer that can run CS:GO in 300fps; H1Z1 in 100fps and DayZ in 80fps, all in high settings, can all of a sudden turn so bad and constantly restart off what seems to be nothing?!

Pleaseeee can someone help!?
 

Mordecai12

Commendable
Jul 16, 2016
24
0
1,510



It was a bad motherboard. I would highly recommend checking PSU first, and then MOBO and RAM. It's most likely a hardware issue.