I have had this resolution working beautifully on an intel 855 board thanks to the embedded drivers and
this post.
Unfortunately, I upgraded and the reg tweak with the embedded drivers is no longer doing the trick! Allegedly the
newest version of Powerstrip finally allows custom resolutions on the intel GMA drivers, but I don't want to drop $30 just for this fix, especially if it may not work.
Does anyone have this working or have free a solution to get this combo to work?