go to nvidia.com update ur gcard driver.download nvidia's software forceware.check ur gcard
settings be sure it support ur lcd.I would suggest u get a quadro since u r investing on high end equipment.i got it around sgd 1600.00-fx1400.
Her dell 27" only requires 1920x1200. It doesn't even need dual-dvi outputs. Any cheap DVI capable card will suffice.