I'm not sure you can hook up two desktop monitors and a third preview monitor to one graphics card. You may well need that BM for preview.
Best option to test that caveat, however, is to just hook it all up and actually test it.
nVidia cards are limited to two active connections, so either two DVI connections, or one DVI and one HDMI.
Thanks, that makes sense.
I have a ATI Radeon HD 5870 and a NVIDIA Quadro FX 4800 in my Mac Pro. I using the NVIDIA for my two monitors and the ATI for my external monitor. I'm using the HDMI connection to my 42'. Everything was working fine until today. I'm not sure why I can't select the external monitor anymore. I've rebooted my Mac (still thinking like a PC user), but that didn't help at all. Has anyone else noticed any changes as far as the external monitor goes?