|I agree with ijack. I suggest you remove the motherboard from the case and bench test it. I assume your case uses standoffs. There should be a metal standoff under every screw hole and ONLY under the screw holes. |
Installing RAM modules requires some downward force. That may be causing some contact on the back side of the board.
Try ONLY on stick of RAM and try it sequentially in every RAM slot. Repeat with the second stick.
Are you sure that the power supplies are being damaged? Sounds kind of strange to me. There may be an internal fuse in the PSU.