It hurts me to see people drilling holes in perfectly good CPUs to make keychains. So here's one for the LGA2011 CPUs.

Print

Print at 0.16mm layer height and 0.35 line width, with support. Preferably with a raft as bed adhesion.

Concentrical top surface skin pattern works better.

Assembly

Note the top shell is not symmetrical. Put in the CPU accordingly to the notches.

Put together with 4 M2x6mm screws with nuts.

Choose a suitable metal ring for your keychain and put it in when assembling the shells.