What type of MDP>DVI convertors are you using?
I'm using XFX Adapter Mini-Displayport to DVI (Active, Single-Link). The active adapters from Club 3D did not work.
Yes,1xDVI (upper one),1xHDMI,1xMDP
and where do you have each monitor plugged in? 1MDP,1DVI,1HDMI?
I have an MSI 6870 and can only get 2 working at a time
Seems like having the right active MDP->DVI adapters is crucial. Like I mentioned above, Club 3D adapters (albeit being "active") did not work, the ones from XFX did.