I'm using winXP x32, a mon with resolution of 1680 1050 and HD4200(integrated)
The latest driver was installed; however, 1680 1050 still not exist in Windows Display Property and CCC.
I tried to connect the pc to mon by using both D-sub and HDMI(DVI is not supported ).There is no difference
The CCC provides form 640 to 2048, including 1440*900 and 1600*1200, but 1680*1050 is not provided.
I also connected the mon to another PC(win7).It was OK, so I think there is no problem with the MON.
Open Catalyst Control Center, Click on My VGA Displays -> Properties (VGA Display) and, uncheck "Use Extended Display Identification Data(EDID) or driver defaults", and set max resolution and refresh rate according to your monitor, and click apply.