I've got an MSI 1080 Ti that I can barely get above 250 H/s in equihash.  Similar issues across other algos.  I've got 16x Tis from different manufacturers and this is the first one to give me issues.  Should this be RMA'd?  I've tried:

--hard uninstall/reinstall of drivers
--swapping board slots
--swapping riser cards/cables
--current and previously stable drivers

The card is currently set at 100% power/+25 gpu/+300 mem and it is consistently pulling at ~45% power.  It shares the rig with two other 1070 GTXs running at 65% power with no issues.  Power draw from the wall is not an issue.  1200W PSU.