PC shutting down randomly - assistance needed.

Duskxii · Sep 13, 2016

Hey guys,

I experienced a very serious issue with my desktop PC last night. The PC randomly shut down and when I started it up again I got the message "Asus anti-surge was triggered to protect system from unstable power supply". This issue and message then repeated itself a few times after which I disabled the anti surge protection in the bios setting since this is apparently a known issue with the bios.

On starting my computer again I was able to use it for a few minutes after which the PC shut down and the fans started producing a large amount of noise due to a much increased speed.
This happened a couple of times after which I opened up the PC case and reconnected the PSU to the CPU and the motherboard.

I was able to run it for a short while this time but had to go to work and wasn't able to give it sufficient time to see if the issue is repeated although I highly doubt something so trivial could fix this issue.

Note that I monitored my CPU temps and they were hovering around ~30 C.

My PC specs are:
CPU: I7 6700K
GPU: GTX 1070
Motherboard: Asus Z170 Pro Gaming
PSU: EVGA 750W G2
CPU Cooler: Noctua D15

Any help would be much appreciated. Thanks!

watrhous · Sep 13, 2016

Duskxii :

Hold up, PLEASE.

STOP!

Go to local hardware store, get yourself a 3 prong circuit tester. These are like $10, and have 3 lights. You plug it into the wall socket and usually lights up 2 amber for correct circuit.

You need to ensure your wall wiring is proper. Why?
Because testing another power supply when your wall wiring is bad will cause the power supply to be bad as well.

Maybe the Asus anti-surge is triggered by your bad wiring in your house? Improper grounding?
Have it checked out.
Quoted 1 time.

I got this from another thread HERE

Duskxii · Sep 13, 2016

Thanks, I will be sure to get one and test the wiring. Assuming the wiring is fine - what could the issue be?

InvalidError · Sep 13, 2016

Asus anti-surge is generally unrelated to utility power and building wiring. What trips Asus anti-surge is out-of-spec voltage and noise on the PSU's output voltage rails.

Usually, this means that the PSU is going bad or is having trouble coping with connected loads, either due to poor design, excessively noisy loads or being otherwise inadequate.

Sometimes though, it may just be that anti-surge is too sensitive. Most Asus motherboards have an option to disable anti-surge in the BIOS if you want to try your luck with ignoring it. When anti-surge tripped on my motherboard, it turned out that my PSU's air filter was packed with dust and overheated. Haven't had another anti-surge error since.

watrhous · Sep 13, 2016

Duskxii :

You might check the Power Supply connections are all SNUG in place also. A quick check could go the distance.

Power Supply could be lacking the juice your rig needs to function.

Duskxii · Sep 13, 2016

I have already reconnected the PSU to the motherboard/CPU and did not encounter the issue afterwards but I only tested it for 10 minutes. Since I have a EVGA 750W 80+ Gold PSU I should have more than enough power for my system, shouldn't I?

InvalidError · Sep 13, 2016

The 750G2 is a pretty good PSU and vasty overkill for your current hardware. In theory, you should be covered there. In practice, weird things can happen when you have multiple high-power systems (mainly the PSU, GPU and CPU VRM) interacting with each other.

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PC shutting down randomly - assistance needed.

Duskxii

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