Greetings

I have a dell optiplex the motherboard code is 0773vg. As I said in the title the usb 3.0 both front and back fail after a few weeks of working.

Obviously I checked and downloaded all drivers it keeps happening even after a new windows install with all drivers downloaded.

All other motherboard functions are ok  although the pc is also very picky about ram types it acceps and also occasionally the will need to be reseated for the pc to boot.
The dell diagnostics finds no problem at all.

Could it be a faulty motherboard or are there things I have overlooked?