I had an old Dell OptiPlex that I upgraded with, WD SSD 1Tb ( it is my boot drive), Corsair RM 850 PSU, Asus RTX 1060 and it ran pretty decent. My son hooked me up with some parts to build a new machine. So I took the parts listed from the old unit and used the new parts he gave me. They are Aorus B550I Motherboard, AMD Ryzen 5 5600 CPU, Gskill Trident Z RGB DDR4 3600 8Gx2 RAM, and installed it all in a Thermaltake 100 mini ITX case.

I updated the bios and loaded default settings. It booted and seemed to be working fine for about 10 mins when it all of a sudden gave me blue screen. when it attempted to restart as soon as the window load screen starts it goes blue screen again. I had reseated the ram, removed the GPU and used on board graphics, cleared the cmos, and finally I removed the CPU and reinstalled it. I used new Noctua NT-H1 thermal paste to reinstall the cooler. It restarted and loaded for about 5 mins and now its back to blue screen over and over.

It will go into the bios no problem and everything appears ok there. Temps look and it seems to recognize all the hardware. I assume I have a failed component but I am not sure what has failed.

Everything was brand new other than the first three components and they were working fine in the old PC. Also I bought those three new around the end of 2019.