Hi, I need help with a 4 monitor setup. I have an HP z400 workstation with two PCI-E slots. I tried a Nvida Quadro FX 1800 and PNY GT9500 and that only ran 3 monitors. I then tried 2 of the FX 1800 and that only ran 3 monitors as well. I have spent a lot of hours with CDW tech support and still no luck. I need the Experts for this one. I need to run 4 HP 24" monitors.