Latest motherboard drivers can be downloaded from here:
http://www.gigabyte.com/products/product-page.aspx?pid=3258&dl=1#driverif you have any other devices attached you would need ot go to their respective websites to see if there are new drivers.
I am a little confused over the comment about enabling Dual Channel mode for the memory.
How many RAM Modules are you running?
What RAM Slots are the in on the motherboard?
If you are running4 sticks then the system will be running in Dual channel mode. If you have only 2 sticks then you need to configure them according to the user's manual for Dual Channel mode. The modules should be in either slots DDR3_1 & DDR3_2 (recommended position) or in DDR3_3 & DDR3_4. If you only have 1 stick of RAM you can not run in Dual Channel Mode.
Have you made any changes to the BIOS settings for RAM or CPU (O/C'ing) or altered any of the voltage settings?
What are your full system spec's especially which HDD's are you running? If you are running any "Green" HDD's this can cause some freezing issues as the drives take time to spin up when being accessed.
Have you checked the Power Settings in either Windows or any other software such as Catalyst Control Centre? If you check here you may find that certain items are being powered down after a period of 20 minutes, this can introduce freezing when you then try to do something as the components need to re-start.