ATI 4350 resolution problem

I have a Hanns-G 28" monitor with a native resolution of 1920x1200 but I can only get 1600x1200 with the ATI 4350 card. I have Vista Ultimate on one disc and Windows 7 on another disc. I have the latest drivers from ATI. I have tried the CCC and the display properties offered by the OS but neither works or offers higher resolution than 1600x1200 even when I click the "force" option. Would appreciate any help. Thanks!

Per AMD, the HD 4350 supports up to 2560 x 1600 resolution.

http://ati.amd.com/products/Radeonhd4300/specs.html

Does the Hanns-G come with drivers on a CD? The problem is basic Vista / Win 7 applying EDID that comes with the monitor. EDID is roughly "Electronic Device ID" which specifies what the monitor can / cannot do. Apparently the Hanns-G's EDID is incorrect and if monitor driver did not ship with your monitor then getting Vista / Win 7 to ignore EDID is rather iffy.

This is a known issue and MS has released a solution, however, the solution has not worked for everyone apparently. See below link to someone who has a similar issue as you do and it also includes a link to MS's instructions on how to possibly resolve the issue:

http://forums.entechtaiwan.com/index.php?topic=6944.0

Do Google (or Bing) searches on "EDID override" or something along those lines.

Below is a link to a tool that can be used to edit EDID profiles, but I cannot instruct you how to use it and you should do additional research on it before simply using it 'cause it can make the situation even worse.

http://www.tucows.com/preview/329441