6326 based cards with more than 4Mb of RAM probably don't work.
The generic VGA driver don't work with 6326, so XF86Setup can't be used for this card. Please use xf86config instead.
Some video modes with high dot-clocks don't work at all, resulting on black screen. Lowering dotclock in that case could solve the problem.
Document based on 3.3 version written by Xavier Ducoin.