I'm looking for some suggestions on a video card capable of supporting a minimum of two displayport 1.2 connections for 4k monitors running at 3840x2160 @ 60Hz. I'm currently looking at a few different cards, but am looking for some input to aid me in making a final purchasing decision. My current dual-DVI-D card supports the resolution, but only at a horrific 30 Hz refresh rate.

The intended use is not gaming, but rather having much more screen space for CAD/CAM/CNC applications. The system is running Win7 64/Ultimate w/ AMD 8350 CPU and has PCIe 3.0 slots, so it should accept any of these newer cards.

Thank you in advance for your input.