I don't think the psu is the cause of this, more like the cooler backplate was too tight and crushed or loosened that capacitor or whatever that is which caused the short. Usually the backplate would have a cutout big enough to avoid any chips on the back of the cpu socket or at least be foam backed to protect the chips. I reckon any RMA of that board would blame the backplate and hence user error so would decline the RMA.
I would recommend not using that backplate with the new board.