I have a Sony Multiscan 420GS and I'm running it at 1400x1050@85hz which it handles fine, but the Xorg "driver" for my monitor doesn't have those resolutions and/or doesn't use the optimal Hz, but instead runs at 60Hz or something.
*** This bug has been marked as a duplicate of 2589 ***
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.