It's from an LC III motherboard with a full load of VRAMand the Apple 8/24bit video card on the IIfx.

I notice that on 640X480 that the desktop image is smaller on the screen with large test and icons, but on the other modes the screen is wider and taller, with the text and icons being smaller but the same style. I think it's doing 800X600.

Also the color depth is different. On 640X480, it gives me Thousands or Millions of colors while on the other resolution it gives me only 256 colors.