I thought the uefi was laggy, some options I had to click around 5 times as I said and others I couldn't click at all so I had to press enter instead.I could make a video, but it would be difficult to show the actual mouse movement and the UEFI at the same time.
the actual cursor movement was acceptable.
I think my mouse must be in a usb2.0 port because windows keeps saying something about a hub could be faster which I guess is my logitech 1 port mouse hub (basically a logitech branded usb extension cable so I can have the logitech receiver in plain sight
but I wouldn't have thought that would make any difference
EDIT: I'm happy with the board though just not a fan of uefi so I hit f2 any time I'm in the bios and use the old style one