Well, no more clock speed for me, unless I want to take the voltage to the ragged edge (for me) of the spectrum. At a measured 1.452v vcore I got a Cinebench run finished at 4800 MHz, and the highest temp from that was 90C on the package, 89C on the hottest core, but it wasn't stable. New board seems more efficient than the old one. I can't go faster but voltages measure higher at the same settings, so I've been able to come down a little on VDIMM and VCORE, and VCCIO & VCCSA. Lowered the dynamic offset from .050v to .040v. Nothing radical, but enough to get a 1055 on Cinebench and not go over 88C with an AIO. Whatever was wrong with the old board doesn't seem to have hurt performance any. And I think it's safe to say that it was getting what this chip had to give with the same voltages. I'm going to play around with LLC and offset and see if I can fine tune it a little more. I know this chip will run these speeds with a lot less voltage.