AMD FirePro V5900 w/ 2GB RAM, DisplayPort 1.2,  Eyefinity, OpenGL, OpenCL, DX11, PowerTune-$599

The new AMD FirePro V5900 mid-range professional graphics cards delivers 512 stream processors and 2GB GDDR5 memory. It has two DisplayPort 1.2 and one dual-link DVI outputs built in, and with the use of the included active adapter, multiple DVI-powered displays are also supported out of the box (in other words, mix and match your display types and sizes).

It supports the new PowerTune power management technology for dynamic clock optimization, and adds GeometryBoost which provides 2X transform and backface culling and 3X tessellation performance in both OpenGL and DX11. Drivers support OpenCL 1.1., OpenGL 4.1, and DirectX 11.

The card retails for $599 US.

Full review on HotHardware:  “if you’re looking for a low power, multiple monitor solution for your 3D animation and rendering workloads, definitely check out the new FirePro V7900 and V5900 cards from AMD.”
Also see Icrontic