Amd Radeon Hd 5550. A few weeks back, amd quietly released a couple of new graphics cards in the radeon hd 5500 series. Amd quietly introduced its new radeon hd 5550 and prepped the radeon hd 5570 gddr5 to follow.
Is it more than just a bit of cheap makeup? Support for amd crossfire frame pacing. The amd driver above may work though.