I have a 2009 octo with 2 gt120 cards, giving me four total outputs. 3 of those outputs are connected to Dell u3011s with no problems. The 4th output (DVI) I have attached to a tiny DVI-HDMI adaptor plug, and then attached a high quality HDMI cable from there to my large NEC display. When I turn on the NEC display, my three monitors wink in and out to indicate a new display has attached, and further, in display properties, I see a rectangle appear in the "arrangement" tab of my display properties. So everything seems fine ... but there is no picture on the NEC display. Further, the NEC display seems to be very confused - the on-screen controls get VERY slow and laggy, takes almost 30 seconds to move from menu item to menu item ... but if I unplug the HDMI cable from the display, it goes back to normal and is not "confused" anymore. Why am I not getting plain old HDMI output out of my DVI port, and what could my gt120 be feeding my display that would cause it to be so "confused" ? Thanks.