I have an Intel i7 6Core CPU system running Windows 7 Ultimate and drive 6 monitors with the ATI Sapphire 5870 Eyefinity 6 PCIe video card. I recently purchased an indicator system that only runs on Ninjatrader 6.5 and my broker is MBTrading. The new MBT Desktop is not compatible with Ninjatrader 6.5 so I need to run MBT Navigator. But, MBT Navigator is not compatible with Windows 7. I can downgrade my system to Windows XP, but my 5870 video card only drives 2 monitors in XP OS. I may be able to use a 3rd party multi monitor driver software but am certain I will need to change video cards. I looked at http://www.9xmedia.com/new/products/...n-software.php but am not sure what hardware configuration I need. My PC has 3xPCIe slots I can use to install new dual DVI video cards, but I really do not know what hardware or software I need to drive 6 monitors in Windows XP. If anyone has a suggestion please let me know here.