I'm having a resolution switch problem with my Voodoo3. This applies to games only, not desktop. For example, let's say I have 800x600 resolution in some game and it occupies the whole monitor screen area (width and height). When I switch to 640x480, it doesn't occupy the whole screen area (that is, there's some black area on the right side of the screen which for example cannot be reached with mouse pointer in-game. I think it is 800-640 = 160 pixels wide). Now if I adjust my monitor (via monitor's settings) so that 640x480 occupies the whole screen, and then switch back to 800x600, the 800x600 screen will not look the way it did before I switched to 640x480. It will look to wide. So basically, whenever I switch reolutions in games I need to adjust my monitor's settings (screen width and position) for the screen to occupy the whole screen area. There must be some setting in 3dfxtools of Amigamerlin's 2.9 drivers to correct this. I'm really not sure what to do.

you have this problem since when now ?

Ok, I'm not having it anymore.

The thing is, that after a new Windows reinstall I forgot to set refresh rates correctly for different resolutions in different color depth. I corrected this and now it's all fine.