They wrote "It refused to work with several of our test power supplies and we are not talking $35 no name units (they all worked perfectly), but some of the best power supplies from Corsair, BFG, Thermaltake, and others. We could grant a pass on this if it was just one power supply, but we noticed a definite pattern with this board and its big brother, the P55-GD80 when using Channel Well based power supplies. "
Since Anandtech tested it using a Corsair CMPSU-750HX, one can presume that this PSU is fine even though it's built by CWT. To be on the safe side (until MSI corrects the issue), you could buy a PSU from another manufacturer or modify your post title to ask what PSU other members are using with that motherboard.
I never tried it, but if it can't be done, you can create a new one. If you know what PSU you plan on buying, it might be relatively easy to check who manufactures it. It would also allow you to post "MSI P55-GD65 and xxxx PSU?"