HDMI through a DVI adapter on one of the two DVI ports on my Matrix HD7970.
I could run HD3D, but that's a little too intensive for one card and high settings.
Nah, I'm more for the native six displays I could run off that beast. 2 rows of 3 screens. Eyefinity FTW.
Not mentioning the wicked backplate, LED logo that changes colour based on load, the fact the fans never spin up because the heatsinks are so efficient, the awesome Asus stickers on the fans in correct orientation, the ROG branding and black and red styling, and the fact instead of a sticker for my case I got a metal badge.