I've got a decent machine, 8 GB RAM, good motherboard etc and an Radeon HD6870 GC. I'm desperately trying to run three monitors on the card. The card has 1 HDMI, 2 DVI and 2 Mini DisplayPorts. The set up is as follows:
- Monitor 1 is connected via the DVI cable.
- Monitor 2 is connected via a DVI to HDMI lead into the HDMI slot.
- Monitor 3 is connected via a DVI lead into a DVI to Mini DisplayPort adapter.
Now, in Ubuntu, I have no problems whatsoever, they all work completely fine as extended desktops. Windows is seeing none of this. I've got the Catalyst Control Centre, and I tried setting up an Eyefinity group, but I can only ever have 2 enabled at once.