First of all, I'm a long time listener, first time caller.
I've tried to find similar cases in several places, but haven't figured out how to pin down what is wrong in my system.
This is a few months old build, where I've had the same problem come up several times a week.
Symptoms:
Everything else works fine, but on launching PUBG (which I almost exclusively play), about 50-70% of times the PC powers down before reaching the lobby screen (no BSOD, just power off).
It shuts down to a state where the power button is unresponsive, while RAM is still appears to be powered (RGB on RAM is still on like in sleep mode), and I have to switch the PSU off and on to be able to boot up the system.
System has shut down similarly upon launching the OpenGL test on Cinebench R15 (which lead me to suspect it could be a GPU issue).
A few times (less than 1/20) the system has similarly powered down right after booting, when displaying the logon screen.
Sometimes, less than once in two hours, the screen flickers for a few seconds in 2D/desktop use
Also:
This typically happens 2-4 times in a row after which the game has reset to default settings (graphics settings all the way down to low, key mappings to default etc.)
I have been in contact with PUBG support and as per their instructions reinstalled the game, reinstalled the GPU drivers, and done a Windows services fault seeking by switching all the non-Microsoft services off and on with MSCONFIG (I was unable to reproduce the issue with this, which again led me to believe this could be HW related).
When the game successfully launches, it very rarely crashes during gameplay (either with GPU stock clocks or overclocked to core clock +150 MHz & memory +450 MHz) – the in-game performance is just fine
I have tried repeatedly launching PUBG with GPU under-clocked (core clock & mem) – this doesn't make a difference
I used the same GPU for almost a year in a Dell Optiplex, without this kind of a problem
I don't really play any other games with this system so I can't say if launching some other similar game would be different.
I would greatly appreciate any help in fault seeking, I unfortunately don't have any spare/replacement components that I could have used to pin down a possible HW issue. I've exhausted all my own skills
Thank you in advance to anyone taking the time to read this.
System:
OS: Windows 10 Pro 64-bit
CPU: Ryzen 5 3600 (stock) – idle 39° C, load 54° C
MB: MSI B450 Tomahawk Max (BIOS 3.60 4/22/2020)
RAM: Corsair Vengeance Black RGB Pro 3600MHz 2x8GB (default XMP setting)
GPU: Gigabyte GTX 1050 Ti LP – idle 30° C, load 73–75° C
SSD: Kingston A2000 M.2 500 GB
PSU: Corsair CV450 450W
Cooler: Cooler Master Hyper 212 Black
Case: Kolink Observatory Lite Mesh RGB
Display: HP Z23n 1920*1080 (overclocked from 60 Hz to 69 Hz) over DisplayPort