https://www.matrox.com/sites/default/files/millenium-g450-user-guide-en.pdf https://www.matrox.com/sites/default/files/millenium-g450-us... page 47: Maximum

https://www.matrox.com/sites/default/files/millenium-g450-user-guide-en.pdf https://www.matrox.com/sites/default/files/millenium-g450-us... page 47: Maximum display resolution Aspect ratio Main display *† Secondary display † 4:3/5:4 (traditional) 2048 × 1536 1600 × 1200