I read here that "3 monitors are support by Ivybridge only if 2 of those are identical and running at the same resolution (such as DP+DP, HDMI+HDMI etc)." I also read at Phoronix that "This means that two of the three outputs need to have the same connection type and same timings. However, most people in a triple monitor environment will have at least two -- if not all three -- of the monitors be identical and configured the same, so this shouldn't be a terribly huge issue." I have also seen this graphic (which I think might have come from Intel originally) suggesting that only systems with dual DisplayPorts can use three monitors (which is also repeated in the Intel FAQ).

So my question is - has anybody actually got three identical monitors running off the integrated graphics with, say, HDMI+HDMI+DVI? I can't find any reports where someone says they did it and it worked. Are there any mITX motherboards which support this? Or have dual DisplayPort?

The only SFF system I could find that should work is the Dell 9010, which has dual DisplayPort and VGA (not ideal). I do have three identical monitors with DVI-D (same clock) so according to the freedesktop people it should work, I am just sceptical as I have not seen a single person who says "works for me".