hi all, wan to ask something here...i m using a asus laptop which using the AMD A6-3420M processor and has dual graphic inside (the build in is HD6520G and the external is HD7670M)...my question is, do i nid to install 2 graphic drivers for this laptop? (ie. one for 6520G and one for the 7670M)...as i found there is separate graphic drivers in amd download page...kindly clarify this for me...thx a lot...