Can you look in your bios and check your drive configuration - have you AHCI enabled - anyhow with intel you can sometimes get a dvd drive not working properly if you don't install the matrix driver after installation - its a storage controller that allows enhanced sata - I'v e been to your motherboards site which is different of course but supports AHCI - you can totally disregard this if it isnt enabled in the bios - if you have something like - sata as IDE, you wont need an updated driver along that line, however, at the site there is a chipset/sata raid driver and if you haven't AHCI you might be able to use it to just update your chipset drivers (after unzipping package and locating them) - hopefully - you could also update your bios to the latest version also.
*Dont change your drive configuration in the bios, as you may not be able to boot to Windows 7 - if you do - you need to reinstall the OS after changing settings in the bios.
Chipset driver - AMD Chipset Driver (include chipset\sata raid driver) 8.641 size 62.36 MB GIGABYTE - Support&Download - Motherboard - Driver - GA-MA770T-UD3P (rev. 1.0)
I f you have AHCI enabled you may be able to update the driver for it in the above package, Im not sure - the only other choice i can see if the F6 method driver at installation - with intel Windows 7 automatically installs the driver during install but requires the matrix driver after installation for proper functionality - if you have AHCI which I doubt in any case - Windows 7 must of installed a driver for it (unless you used the F6 method) which may need updating - complicated but less complicated if it isnt enabled.