Question Hard periodic power cycles; no event viewer events

[nukemnet77]

My Windows 10 desktop started power cycling itself during light use. No event viewer events to mark trouble at the point of losing power. I could use some help isolating. Details below....

System Characteristics:

• Custom build about 1.5 years old since last hardware change
• Gigabyte mobo
• i7 7700 3.6GHz
• 32 GB RAM
• EVGA Nvidia GeForce GTX 1070
• 750w modular power supply

Condition:

About after 5-10 minutes of light use browsing maps or on social media, the workstation loses power and reboots itself (hard reset). It happens so fast that Windows does not get a chance to capture an event. The only applicable entries in the event viewer state "Windows was not properly shut down; the previous system shutdown at 00:00:00 AM on 1/16/2020 was unexpected."

Condition began the day after this Microsoft update: "9NMPJ99VJBWV-Microsoft.YourPhone" that was applied on 1/4/2020. This update is not a removable update (handles license keys?). Not sure if related.


Troubleshooting steps taken so far:

• checked perfmon/event viewer - nothing notable
• ran Windows Update - current
• checked Intel drivers - current

Suspected power issues from power strip plugged into new APC UPS

• replaced power cord with heavy gauge (13a)
• plugged power directly into wall (instead of APC UPS or surge protector)
• ran power troubleshooter

Suspected OS-related

• sfc /scannow - nothing found
• clean boot - condition still exists
• updated graphics drivers - w/ clean boot - condition still exists
• tried multiple browsers (FF, Edge) - condition exists
• safe mode - condition exists

Suspect hardware...

 

[Roland Of Gilead]

This is typically a PSU related issue.

Have you another you can swap out to confirm? What is the exact model of your current PSU?

 

[nukemnet77]

This is typically a PSU related issue.

Have you another you can swap out to confirm? What is the exact model of your current PSU?

Thanks. I do not have a spare at the moment. Its a "EVGA Supernova 750 G1, 80+ Gold 750W, Fully Modular, 10 Year Warranty, Includes Free Power On Self Tester Power Supply 120-G1-0750-XR" bought in 2015. I'll see if they have an application that can validate the cause and then contact support since it is on a 10 year warranty.

 

[xravenxdota]

Get a program like Hwinfo 64 to monitor your voltages.This can happen as Keith said psu issue.Even the best quality can break.

 

[nukemnet77]

Get a program like Hwinfo 64 to monitor your voltages.This can happen as Keith said psu issue.Even the best quality can break.

I captured the reboot in a DBG file using hwinfo64. Could use some assistance reading it. I don't have a MSDN subscription to get Visual FoxPro to view the file. Thank you.

HWlink64 DBG