Windows 10: PC keeps rebooting No BSOD

My PC keeps randomly restarting when it's on for too long, but mostly when I'm playing certaing games, sometimes not even 1 minute in. It just freezes and then it restarts, no bsod, no warning, nothing. I Ran mdsched.exe and returned no errors and also ran chkdsk on C drive with no errors I have the event logs here system logs.evtx Processor AMD Ryzen 5 3400G with Radeon Vega Graphics 3.70 GHzInstalled RAM 16.0 GB 13.9 GB usableStorage 224 GB SSD Patriot Burst Elite 240GB, 932 GB HDD WDC WD10EZEX-22MFCA0Graphics Card AMD RadeonTM RX Vega 11 Graphics 2 GBDevice ID 80737344

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PC reboots (no BSOD) on CPU stress

Hi fellow TPU members,

not too long ago, the box my gf's PC was transported in gave way on the stairs. Yes, you got it right, that sent a PC tumbling down a flight of steps alright.

Stuff broke. Also, stuff remained intact somehow.

I bought her a new case, new CPU cooler and we removed the floppy drive, so far so good. But the PC started crashing for no apparent reason, without a BSOD.

I tested:

• Memtest86+, left overnight, 0 errors
• Scanned the HDD for errors, nothing there
• Left FurMark burning up the GFX card and drawing some power, no problems there
• Ran Ubuntu from a Live CD doing nothing special, didn't crash
• Ran OCCT, Linpack, Prime95, all 3 caused reboots within minutes
• Oh, and I disabled "Restart on error" so I'm sure it's not a BSOD.

Now, I can still try and test something CPU intensive on Ubuntu, but my guess is the CPU didn't survive.
Before I do anything drastic like whippin' out the magic wallet and get her a new AMD quad, is there anything I didn't see?
I'm guessing the motherboard could be borkered as well, but can I check that other than replacing the CPU with a working one?
Any suggestions on which proggies I can use from an Ubuntu Live CD to stress the CPU?

 

PC reboots (no BSOD) on CPU stress

Try OCCT with just one stick of ram if crash then try the 2nd stick by it self. Lets eliminate the ram from the scenario.

I would think its more likely to be the Ram cuz of OCCT or maybe the mobo but I doubt the tumble did anything to the CPU.

 

Pc reboot with no BSOD

I don't get any BSOD , it just reboot like the power goes out.

The motherboard is new i got it 8 months ago like every part i have out of the hds and the psu.

I'm talking about my I7 system.