Summary: I purchased dual PNY Quadro NVS 450 video cards along with my Dell Precision T7400 workstation. I have eight 24" Samsung 2433BW monitors with resolutions of 1900 x 1200. I've had this particular setup for approximately 2.5 years. Unfortunately, I can say that I've had all eight monitors working for less than 1% of that time. I spoke with PNY support, Dell support and Samsung support.
Summary: i was using a Matrox quad video card before this one. It died because the fan died on it. I switched to Nvidia because it supported Windows 7 at the time and Matrox didnt. The first card worked and then suddenly quit supporting the multiple screens and finally it was down to 1 monitor it would recognize. I have 4 of the same exact monitor models. I returned the card and got another one.