Ever since building the system 2 days ago, only the top 2 USB ports have worked (the ones next to the PS/2 port). The other 2 pairs (including the USB 3.0 ports) do not appear to work at all, even during bootup, so I'm inclined to believe this is not an operating system issue (I've tried kb, mouse, memory sticks, etc).
I updated all the mobo drivers from the included disk, and I also specifically downloaded and updated the USB 3.0 drivers, but that didn't do anything either. The front USB ports on my system, connected to the USB4 header, seem to be working fine (tried unplugging and trying again, in case there was some weird conflict, but the built in ones still didn't work).
At one point, right after I had installed the drivers from the motherboard cd, I received a Windows message saying there is too much voltage in one of the USB ports, etc. However: (1) the issue had been occurring before this anyway, and (2) nothing was plugged into the malfunctioning ports at the time, and a keyboard and mouse were the only things plugged into the 2 working ports. Have not seen that message again.
Strangely, all the ports seem to be present in device manager without any issues. I can delete them, and then upon restart, Windows 7 has them back in there and functioning properly, so it says.
Do I have a defective motherboard? Is there any way to test the ports internally with some mobo diagnostics?
Specs (everything is brand new, just assembled):
GA-890GPA-UD3H Rev 2.1
AMD Phenom II 1055T
8GB RAM (2x4gb) Corsair CMX8GX3M2A1333C9
Corsair TX650W Power Supply
Windows 7 Professional 64-bit (fresh install)