Question Random Restarts, BIOS set to 'Stay Off', Reboots under heavy load

Pie_Crust

Distinguished
Aug 7, 2013
19
0
18,510
I have a question, I'm getting random restarts when playing VR. As random as the most heaviest scene in Skyrim you can imagine or as light as putting on the headset on SteamVR Home. I'm currently updating Windows in case it's software-related.

The event viewer shows nothing relevant, only that it was an unexpected shutdown. Looking around the net says that PSUs can turn themselves off to protect the system when it can't give what it asks but my question falls in wouldn't that count as a power-loss? My BIOS is set to 'Stay Off' so it shouldn't be restarting. I got a recording by a friend that captured the hardware data the second it rebooted. The wattage of CPU and GPU are at 403w. I have a 720w PSU (about 5 years old, 80+ Bronze).

The system has 3 HDDs and a M.2 SSD.

AMD Ryzen 7 2700X and NVidia GeForce GTX 980Ti

The GPU voltages the second it shutoff (Don't have the data of the other rails) are as follows:

Rail; Current; Min; Max; Average;
PCIe: 11.928v; 11.784v; 12.336; 12.189v; 210w max
8-pin 1: 12.168v; 11.768v; 12.432v; 12.326v; 80w max
8-pin 2: 12.032v; 11.456v; 12.408v; 12.249v; 97w max

I'm going to install Windows updates in the meantime and do a memtest in case it's that but if you guys can guide me to see if it's the PSU or not, I would greatly appreciate it!
 

Pie_Crust

Distinguished
Aug 7, 2013
19
0
18,510
e5bTW6b.png


These are the values at the moment, no stressing, pretty much idle. Only Firefox, Steam, and Discord are open
 

Pie_Crust

Distinguished
Aug 7, 2013
19
0
18,510
720W is the wattage of the unit. Can you include the make and model of your PSU? Try using a reliably built PSU with at least 750W of power for the entire system and see if the issue crops up.

It's a Sentey XPLUS POWER 725*W unit, my bad.
Model number XPP725-PS

It had a 3 year guarantee, it was bought at the same time as my GPU at the end of 2015. I have no access to a decent PSU, just a bunch of generic units

Actually this one is newer than my GPU because the original one had a capacitor that exploded and it was RMA'd, don't really recall when, probably within the year of purchase
 

Pie_Crust

Distinguished
Aug 7, 2013
19
0
18,510
q45JI8E.png


So I did a stress test and a minute since it started, the voltages dropped this low. I stopped it out of fear of damaging my system. Is it safe to say that the PSU needs replacing?

3.3v: -11%, +1%
12v: -3% +4%
5v: -7%, +0%

All decimals floored to the hundreds