PC shuts down during stress test without warning

rakshithkumar12321 · Aug 24, 2017

Hi..
I just upgraded to a ryzen 5 1500x and a Asus b-350 plus mobo and when I run Aida 64 stress test it shuts down automatically without warning in less than 30 seconds. The temperature of processor was 48-52 degrees Celsius.
I have a corsair 650 watt psu , Kingston 8 gb ram , gtx 970
Please help!!

Paperdoc · Aug 24, 2017

It might have reached a higher temperature than you were able to observe, and that might have caused it to shut down. But there is another possible cause for you to check first. Mobos monitor the CPU cooler system via the fan speed signal that is sent from the CPU cooler back to the mobo on Pin #3 of the mobo header. On many mobos, IF that fan speed signal fails the system will issue a beep and warning, and then shut down completely soon after without even waiting for the temperature sensor to read a high temp. This is a way to prevent rapid overheating of the CPU chip if its fan fails. Now, a CPU cooler fan could fail and run much too slow or stop entirely, and that would cause this to happen. But it can also SEEM to happen if you do NOT connect the CPU fan to the CPU_FAN header, OR if the connection at the header is bad and the signal just does not get through. So check the connector plugged into the CPU_FAN header. Carefully unplug it and re-connect it a few times to be sure it is secure.

rakshithkumar12321 · Aug 24, 2017

Paperdoc :

It might have reached a higher temperature than you were able to observe, and that might have caused it to shut down. But there is another possible cause for you to check first. Mobos monitor the CPU cooler system via the fan speed signal that is sent from the CPU cooler back to the mobo on Pin #3 of the mobo header. On many mobos, IF that fan speed signal fails the system will issue a beep and warning, and then shut down completely soon after without even waiting for the temperature sensor to read a high temp. This is a way to prevent rapid overheating of the CPU chip if its fan fails. Now, a CPU cooler fan could fail and run much too slow or stop entirely, and that would cause this to happen. But it can also SEEM to happen if you do NOT connect the CPU fan to the CPU_FAN header, OR if the connection at the header is bad and the signal just does not get through. So check the connector plugged into the CPU_FAN header. Carefully unplug it and re-connect it a few times to be sure it is secure.

thank you for the reply..
i will check the fan header connection and let you know if it solved the problem

rakshithkumar12321 · Aug 25, 2017

Paperdoc :

It might have reached a higher temperature than you were able to observe, and that might have caused it to shut down. But there is another possible cause for you to check first. Mobos monitor the CPU cooler system via the fan speed signal that is sent from the CPU cooler back to the mobo on Pin #3 of the mobo header. On many mobos, IF that fan speed signal fails the system will issue a beep and warning, and then shut down completely soon after without even waiting for the temperature sensor to read a high temp. This is a way to prevent rapid overheating of the CPU chip if its fan fails. Now, a CPU cooler fan could fail and run much too slow or stop entirely, and that would cause this to happen. But it can also SEEM to happen if you do NOT connect the CPU fan to the CPU_FAN header, OR if the connection at the header is bad and the signal just does not get through. So check the connector plugged into the CPU_FAN header. Carefully unplug it and re-connect it a few times to be sure it is secure.

well i tried reconnecting the fan header but no luck , it still shuts down without warning.But when it shuts down the case fans and the CPU fan will still be running

Paperdoc · Aug 25, 2017

That does sound like an overheating issue. I suggest three things to try.

1. If you're not doing this already, find the utility on the CD that came with your mobo to show you the temperatures of mobo components while running. This is an app that runs under Windows and can stay open on your screen while you are running other things, so you can see several temperatures all the time. Keep this running while you run your stress test so you can watch important temps for ones that rise fast before shut-down. OR, if there are no really high temps that should trigger the shut-down, proceed to my third idea.

2. See if there is a similar tool to monitor the temperature of the GPU chip on your video card. Check that also.

3. Many mobos have an option, for each fan header, to set the temperature limit used to trigger an alarm for overheating of that specific device (like, e.g., the CPU). They also have a setting for what is the lowest speed that the fan they control is allowed to run before they consider it failed. Check both of those. It is possible your mobo is running the CPU fan so slow (because the CPU chip is NOT getting hot) that the mobo thinks the fan has "failed" and triggers the shut-down.

For further info, tell us what fans (exact model numbers if possible) and CPU cooler system you have, and exactly where each of them is plugged in.

rakshithkumar12321 · Aug 25, 2017

Paperdoc :

That does sound like an overheating issue. I suggest three things to try.

1. If you're not doing this already, find the utility on the CD that came with your mobo to show you the temperatures of mobo components while running. This is an app that runs under Windows and can stay open on your screen while you are running other things, so you can see several temperatures all the time. Keep this running while you run your stress test so you can watch important temps for ones that rise fast before shut-down. OR, if there are no really high temps that should trigger the shut-down, proceed to my third idea.

2. See if there is a similar tool to monitor the temperature of the GPU chip on your video card. Check that also.

3. Many mobos have an option, for each fan header, to set the temperature limit used to trigger an alarm for overheating of that specific device (like, e.g., the CPU). They also have a setting for what is the lowest speed that the fan they control is allowed to run before they consider it failed. Check both of those. It is possible your mobo is running the CPU fan so slow (because the CPU chip is NOT getting hot) that the mobo thinks the fan has "failed" and triggers the shut-down.

For further info, tell us what fans (exact model numbers if possible) and CPU cooler system you have, and exactly where each of them is plugged in.

Thanks!!
I'll monitor the temperatures and I use the stock cooler which comes with the CPU

rakshithkumar12321 · Aug 25, 2017

i just updated my bios and I think i fixed it..
stress test ran for around an hour without any problem
the temperature was around 64 degrees(is it fine??)
Thank you..

Paperdoc · Aug 25, 2017

I don't know the answer for sure. I found a few Tom's lab tests that indicate that, using the stock air cooler at high workloads, your CPU will report its temperature to be about 60 to 65C. The AMD spec says its max is 95C. Tom's Labs say their testing indicates the true internal temperature may be significantly lower than what the sensor reports, and they speculate that is a deliberate bias by AMD to ensure the CPU gets very good cooling and does not get close to its rated max temp. Bottom line, the temp you are seeing is probably just about right for a CPU under heavy load with the cooler you have, and quite safe.

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