Basically just the CPU fan, case, and PSU (if you're lucky). If someone can figure out how to get Doom running on just those 3 things, young people will be able to ascend.
I just had to buy a replacement 9800X3D yesterday because the previous one from early 2025 fried Saturday night. I paid $10 less for the new one, was very surprising. This post caught my attention because I had to remove and reinstall my Noctua cooler.