Windows 10: PC crashing BSOD while gaming

I've been trying to figure this issue out for days not and I'm at my wits end. I'll be gaming anywhere from 5 minutes to 5 hours before a BSOD crash WHEA error.A fatal hardware error has occurred.Reported by component: Processor CoreError Source: Machine Check ExceptionError Type: Bus/Interconnect ErrorProcessor APIC ID: 14The computer has rebooted from a bugcheck. The bugcheck was: 0x00000124 0x0000000000000000, 0xffffad86f60a3028,&n

:)

 

Regular BSODs on my gaming PC

Note: before doing this, I've booted from GParted and did "Check and repair" on all my partitions, because about an hour ago someone suggested that to me in Discord.

Somehow, the "Health" tab is empty.

 

all games crash!

I suggest you run rthdribl > http://www.daionet.gr.jp/~masa/archives/rthdribl_1_2.zip
Increase the window size step by step and watch your vga temps permanently.
What happens?
If it crashes, run at stock speeds as suggested before and retry.

P.S.: When your system locks, does the display signal turn off after a time?
Stuttering sound or no sound at all when freezing?
What X1800XT model do you own exactly?

 

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?