Just did a new install of a Optiplex 780 with dual Nvidia Quadro NVS 290 graphics cards (1x PCI-e x16 and 1x PCI-E x1) on Win7 Professional 32 bit. I have multiple machines running with a similar configuration to drive 3 monitors on XP 32 with no issues at all.
On this Win7 machine, it seems impossible to enable all three monitors with both secondary monitors set to extended, either through nview or through Win7 display configuration. I can enable the two secondary displays as a clone of each other, but can't setup both as extended. I whenever I go to enable the third display as extended, it shuts down the previously extended monitor.
I have a Win7 32 Opt780 running a single Radeon HD 4350 (which has 2xDMS59 connectors) and that supports the triples with no issue.
I tried to find articles on nview or the dual card setup having issues on Win7 with no success.
So, my question is, can 3 (or 4) monitors be connected as extended desktops using this setup on Win7.