I've never really messed with getting GDM off on amd. But im interested enough to try it. Current setup is below. Vsoc at 1.15v vdd at 1.6v and Vddq 1.55.
This is on the MPower, and they do not have GroupB termination settings out yet (supposedly this helps A die significantly with GDM off 8400).
Just looking to see what to mess with to see if I can get it running.