Matrox G450 - Can't use 32 bit color at 1680 x 1050

Matrox G450 - Can't use 32 bit color at 1680 x 1050 resolution

Hi there,

I am currently using a Matrox Millennium G450 dual head display adapter with a WSXGA (1680 x 1050) LCD monitor on Windows XP.

Using 32 bit color quality at lower resolutions such as 1280 x 768 is no problem, but when I increase to the monitor's native 1680 x 1050 resolution, I am only able to use 16 bit color. This results in icons looking all jagged as well as severe banding in my display.

If I try to change the settings to 32 bit color in Display Properties >> Settings >> Color Quality the screen resolution slider automatically drops from 1680 x 1050 down to a lower value.

I used the Matrox Tech Support Tweak Utility (MTSTU) to create the 1680 x 1050 setting as it wasn't available by default. Not sure if this has anything to do with the problem, could it be that the G450 doesn't support WSXGA with 32 bit color?

Any advice would be appreciated here.

Cheers
Peter