I just purchased an Asus VG248 monitor (supports 144Hz refresh rate) and I can not increase the monitor's refresh rate beyond 60Hz from Windows. My system setup: 2x AMD 6990 graphics cards 1x Asus VG236 connected via DVI cable to graphics card #1 DVI port #1 (120Hz) 1x Asus VG248 connected via DVI cable to graphics card #1 DVI port #2 (60Hz) Does anyone know why I can not set the new monitor to a higher refresh rate?