Help w/ crash

Any advice on where to go from here? This console was running dmesg -w to try and catch an intermittent crash... And this is what I got. I am using an el cheapo USB wifi adapter that I'm suspicious of.

Everything was working fine until I rebuilt nixos with Nvidia support... Now my old generations of the OS are crashing after a few minutes (display on, no response to input, keyboard lights don't respond, SysRq doesn't work)