i have a Gigabyte 990fxa-ud3 motherboard and lately i have been having major motherboard usb issues were all the ports on the motherboard will disconnect and then reconnect and it happens every 15 minutes or so the only things that are pluged in to the motherboard usb are my mouse and keyboard and i have deleted and reinstalled my drivers for both my mouse and my keyboard, and only the motherboard io usb ports do this the ports on the front of my case work perfectly. please help ,thank you