Rarer than hen’s teeth: Graphics card maker Sapphire has announced a Mac Pro-compatible graphics card (works in 2010 and above models). It’s based on AMD Radeon architecture and has some nice features like two mini DisplayPorts, HDMI and dual-link DVI. But expect to pay dearly for the privilege – $480.

Bear in mind that other third-party graphics cards will work in Mac Pros running Lion and Mountain Lion – I’m using a plain vanilla PC-compatible Nvidia GeForce 450 GTS in mine, which gives a nice boost for game frame rates over the Nvidia 8800 GT card it came with.

Update: Bare Feats already has the card in hand and has put it through its paces; benchmarks at the link.