[SOLVED] Asrock Mobo USB 3.0 rear ports not working

Hi all,

Got a Asrock B75 PRO3-M mobo. Just installed a new SSD with Win 7 64bit on my PC, and reinstalled everything from scratch. However, just realized the two rear USB3.0 ports won't work no matter what I tried thus far. No response from plugging in USB mouse & keyboard or any USB stick or HDD. No flashing no nothing. All the other USB 2.0 ports are working though. And it was also working before I changed over the SSD! I did install the Intel USB 3.0 driver & all the drivers listed in the link below:

http://www.asrock.com/mb/Intel/B75 Pro3-M/?cat=Downlo...

Ran out of ideas what to try. Please help! Thanks!

P/S My mobo only has two rear USB 3.0 ports, the rest are all 2.0 ports AFAIK