I'm not sure at what color depth the 1360 will do 1600 X 1200. I've never had a monitor which will go up that high. The numbers represent the first number in the highest resolution at which each card supports 24 bit color. So the 1152 does 24 bit color at 1152 X mumble. The 1360 does 24 bit color at 1360 X mumble, and the 1600 does 24 bit color at 1600 X 1200. The 1152 and the 1360 will each do 1600 X 1200 at at least 8 bit color, I don't know if the 1360 has enough VRAM to do it at 16 bits.