only had issues with hyper, with psc running qpi at 5+ ghz and mem at 900-1050 is no problem on these on H55M-ud2h. I think during one of our later sessions we even hit close to 1100. This particular example doesn’t run high qpi and I’ve since stopped with the platform, but looking at scores from Tantekaethe (we’ve benched this platform together a couple times) might give you some other examples.
https://hwbot.org/submission/4039624_ground1556_pifast_core_i3_540_15sec_600ms