@itwas
Maybe it's a combination of my card + motherboard. I don't know. But it's a 2GB card, yet MacOS is only seeing 1GB.
I've tried DVI, DVI, HDMI and DVI, DVI, Display Port.
Conceivably I could drive 2 DVIs from the Dual Link DVI socket, with a Y adapter, giving me 3 DVIs.
But I got tired...