CPU or Motherboard problem?

[StonedPenguin]

I rebuilt my custom water desktop, having a bit of a nightmare and looking for a little help please

It ran fine for 2 days then this morning I got a Kernel_security_check failure BSOD whilst not doing much

Reboot.. No display though everything powers on

Motherboard: MSI X570 Tomahawk WIFI (I've read a few posts regarding this board and 3000 series nvid gpus combined with 5000 series amd cpus it can cause PCIE slot 1 to render no display)
5950x
3090 x1 (connected to main 16x pcie slot1)
3080fe x1 (connected via riser)
seasonic 1300w

I tried:
clear cmos
re-write cmos
swapping RAM for a complete different set
swapping out PSU for one I know has no issues
removed 3080fe entirely

Now I was stumped so I drained the loop and ripped it all out
I then tried putting 3090 in second pcie slot, 3080 in first pcie slot, nothing
I put an old nv gt730 in all slots, nothing

I bought this board as a bundle with a 5800x in full working order, replaced it with a 5950x.
Popped to my friends and borrowed a 3800x and BINGO it springs to life!!

Is the 5950x dead or is the mobo just being retarded with this CPU for some reason? (was fine for 48hrs+ till BSOD today)

Thanks!

 

[StonedPenguin]

Just to add, the 5950x is brand new so has only worked for 2 days before the BSOD

I’m inclined to think that’s the problem right now.

Edit: Yep after much testing the 5950x is certainly dead hope RMA is pretty quick only had it a couple days.