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post #1 of 12 (permalink) Old 01-11-2020, 06:07 AM - Thread Starter
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PSU or Motherboard problem

Hi:

My PC started shutting down recently,due to ASUS AntiSurge Protection. When I check in the BIOS the 12v reads 12.4 and starts climbing slowly to 13.5V+. But when I used a voltmeter, (jump started or while using the PC normally) the voltmeter reads 12.28v max. Do I need to replace my MoBo or my PSU? I read some posts recommending disabling ASUS AntiSurge, but I dont know if this is a good idea.

Specs

MoBo: Asus z170-A
PSU: Seasonic 750W Prime
GPU: EVGA 1080Ti FTW3

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post #2 of 12 (permalink) Old 01-11-2020, 06:29 AM
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Quote: Originally Posted by carlos1662 View Post
Hi:

My PC started shutting down recently,due to ASUS AntiSurge Protection. When I check in the BIOS the 12v reads 12.4 and starts climbing slowly to 13.5V+. But when I used a voltmeter, (jump started or while using the PC normally) the voltmeter reads 12.28v max. Do I need to replace my MoBo or my PSU? I read some posts recommending disabling ASUS AntiSurge, but I dont know if this is a good idea.

Specs

MoBo: Asus z170-A
PSU: Seasonic 750W Prime
GPU: EVGA 1080Ti FTW3

Yea I wouldn't feel comfortable about turning off anti-surge either.



So the MB is 12 years old, how old is the PSU?

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post #3 of 12 (permalink) Old 01-11-2020, 06:31 AM
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Hi,
How did it shut down exactly beside what you say lightening/ power outage/...
Do you have a power strip surge protector or battery backup system ?

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post #4 of 12 (permalink) Old 01-11-2020, 06:41 AM
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Asus Anti Surge is garbage and will more often than not cause false alams so turn it off
If you still have problems after that there might be a hardware problem

Edit: the first Prime models came out in 2016/2017 and comes with a 12 year warranty so the PSU is 3 something years old at most and well within warranty IF there is something wrong with it
And where in gods name did you get that the motherboard is 12 years old Z170 did not exist 12 years ago it came out in Q3 2015 so its 4 and half years at most

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Last edited by shilka; 01-11-2020 at 06:57 AM.
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post #5 of 12 (permalink) Old 01-11-2020, 06:52 AM
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Try reading mutliple +12V rails, not just from one spot. One of the voltage sensing unit on the motherboard might be broken as well, hence the issue.

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post #6 of 12 (permalink) Old 01-11-2020, 07:17 AM - Thread Starter
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Quote: Originally Posted by BroadPwns View Post
Try reading mutliple +12V rails, not just from one spot. One of the voltage sensing unit on the motherboard might be broken as well, hence the issue.
Thanks for your response!

I took a couple of readings from a 4 pin molex while using the PC, the voltmeter showed 12.28v but the bios showed 13.4v. Also I jump started the PSU and took readings from pins 10(12v) & 17(Ground) and 11 (12v) & 17 (Ground), I got 12.28v ~ 12.30v. Is there another way to verify the 12v rail?

Thanks!
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post #7 of 12 (permalink) Old 01-11-2020, 07:22 AM
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Don't jump start as it's worth jack sheit in this case. Launch your PC and read the voltage from the back of your motherboard, from +12V EPS socket (CPU power socket), +12V from 24-pin socket (https://ae01.alicdn.com/kf/HTB1gXE9K...opni-z-cze.jpg is a pinout for 24-pin) and from +12V PCIE cable or plug, if you have that one floating unused.

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post #8 of 12 (permalink) Old 01-11-2020, 07:37 AM - Thread Starter
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Quote: Originally Posted by BroadPwns View Post
Don't jump start as it's worth jack sheit in this case. Launch your PC and read the voltage from the back of your motherboard, from +12V EPS socket (CPU power socket), +12V from 24-pin socket (https://ae01.alicdn.com/kf/HTB1gXE9K...opni-z-cze.jpg is a pinout for 24-pin) and from +12V PCIE cable or plug, if you have that one floating unused.
Took the readings from the back of the motherboard as you suggested, 24 pin and CPU socket. The results are the same 12.28v ~ 12.30v.

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post #9 of 12 (permalink) Old 01-11-2020, 08:30 AM
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Open HWiNFO and see if you have any higher voltage than you just read and see which sensor reads that.

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post #10 of 12 (permalink) Old 01-11-2020, 10:59 AM - Thread Starter
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Quote: Originally Posted by BroadPwns View Post
Open HWiNFO and see if you have any higher voltage than you just read and see which sensor reads that.
Do you mean the model? I think it is a Nuvoton NCT6793D.

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