When I mount it in the PCI-E x1 slot, the bracket does not line up with the back of the case. In fact it is a few millimetres too high and a few millimeters off the side of the case. I wondered if the card was simply badly designed, but I found the dimensions of another PCI-E USB controller and it was exactly the same size.
What can I do about this? Should I just try and force the card in?
The cards can normally lean a bit in either direction so that the screw on top of the bracket can be installed to mount it to the case.
There is a little metal slot on the mother board tray or the back of the case that the tab on mounting plate of the card slides into. Use a flash light, maybe you can see where the tab is binding. Many times the metal tab needs to be bent a touch to slide into the slot on the case. You can normally bend that tab a tiny bit with your fingers.
Thanks for the advice. This time I took more care that the bracket slid into the slot in the case and it just about fit.
One other question - the USB ports are quite close to the top of the opening on the back of the case. Therefore it seems a significant possibility that the metal exterior of a USB plug will at some point accidentally touch the metal case. Would that matter? Is this part of the plug attached to anything inside the USB device?