Will the Cooler Master Hyper 212x CPU cooler fit on the MSI Z87 MPOWER MAX motherboard?

If it fits on LGA 1155 boards, it'll fit on this board.  Although it's a different socket from LGA 1155, the distance between the screw holes are the same.

It should fit.  The things you should be more concerned about is:

RAM Height

Case Size

and if the width of the cooler will interfere with the first PCIe slot. This is uncommon but can happen. However it will not happen with the 212.