yep, swapped between both of them and the glossy one works on both ports at full resolution. the video card in the soon to be replaced machine is an nvidia Quadro FX 3500 which I'm sure came with the box, which is from ~2007. I was amazed that it would run even one of the screens.
the matte screen shows green light but black screen (and the display settings tab doesn't even ask me whether the new resolution worked) on both 2560x and 1920x but doesn't work. it's academic at this point anyway with the machine being replaced.
will have to see what my MC location can do for me, and whether the eventual likely machine I'm going to get at work will be able to drive both of them correctly. I suspect I will end up holding out for an Optiplex 7010 when they are forced to deploy new ones, vs getting stuck with a re-deployed 780/790 which doesn't have Displayport. or the likely un-capable E6430, unless I spend more of my own money to buy a dual-displayport docking station, which I don't want to do until I confirm whether the E6430 will actually drive both displays anyway. it's a bit of a do loop...
Originally Posted by austinpike
did you try the matte on the same DVI port the glossy was on? On those older video cards with two DVI ports, it is likely that only one of them is dual-link. (I understand you were running the CRT on port 2, but 1800x is not really indicative of whether it will do 2560x.)