Dell Optiplex 755 Heatsink to AM3/AM4/AM5 Adapter

I seem to get a lot of old Dell Optiplex 755 (or similar) machines in my posession, so naturally I have a drawer full of these heatsinks. I decided to put them to work instead of letting them rot in that drawer.

I know for a fact it works on AM4 mounting holes, but I included the other sockets because they all seem to have a similar pattern.

This file is best printed with the flattest face facing down on the build plate, with supports turned on. You will have to go into the screw holes and add support blockers. All screw holes are optimized for standard #6-32 UNC PC case screws, even the part where you screw the heatsink down. You may have to tap out the screw hole on the heatsink by screwing in the case screws into the holes forcibly before attatching the brackets- that's what I did at least, I completely understand it if you don't want to do that because it is pretty dumb. I have yet to make any kind of mounting for a fan to be placed on the heatsink, but I may do that at some point. 80mm fans are the perfect size to be taped to the side of the heatsink in the meantime. In testing, the smaller version (there are bigger and smaller versions of the optiplex 755 heatsink) was able to keep a Ryzen 3 Pro 1200 processor under full load (40-45 watts) cool with minimal fan speed or even passively, for a little while. I would reasonably expect the small heatsinks to be able to manage standard 65 watt chips, whereas the larger heatsinks could probably do 85 watts reasonably well.

Printed with PETG on an Elegoo Centauri 2. You're gonna want PETG or something similarly robust for this so that it can hold strong under heat from a processor and the VRMs- so no PLA!