I must say that it is hard to get the right cpu’s and watercooling block these days for this setup.
My 3000+ mobile posts 2700MHz. Best chip so far with that crappy alu cooler.
I am thinking about modding my Single stage so it will fit.

I did find a great cpu in my E8400 binning project, it needed <1.20v to run WPrime 1024M and Cinebench 11.5 for 4.5GHz.
Still have to test 26 others...