I have xHCI set to Auto; is that correct? What are your setting for the UEFI for working USB3.0?
On sleep, just tried it again (I normally never use sleep on my desktop) and it wouldn't sleep. It did when I was first setting it up, so perhaps now because I'm using a BT trackpad and not the wired mouse?
I have sleep issue with q77m-d2h with 10.8.1. With 10.8.0 I didn't have problem. Can someone confirm that sleep works with q77m-d2h with 10.8.1?