http://www.matrox.com/mga/products/mill_g450/dh_chart.cfm Max 2nd output resolution 1600x1200 But doesn't say the refresh rate, I'm hoping for 75 or 85. With two Matrox 450, are you able to have 4 monitors on Windows 2000 at 1600x1200 each? I think it might be a cheaper alternative to the AppianX quad monitor card for $900.
Yes, you can get 1600X1200 resolution up to @85Hz on each monitor with the G450s (provided your monitors support these specs)