I've got a new Asus Xonar PCIE sound card today and went.to fit it, but I can't get the card in the PCIE slot because of the back plate. I've attached two photos - one where you can see the back plate of the card is snug with the case as I'd expect to screw it, and another where you can (poorly) see the card isn't actually in the PCIE slot at all. It's as if the board is too low or something, but my GPU doesn't have this issue and fits perfectly.
Images: http://imgur.com/a/2jNMlxu
Images: http://imgur.com/a/2jNMlxu