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.
Very strange issue, what is the exact model of your MSI branded gpu? Is it a custom cooled version? If you tried all other methods to test, the last effort should be RMA for replacement.