Visiontek HD 5870
Visiontek HD 5870 @ Bjorn3D
"At Bjorn3D over the years we've seen ATI and Nvidia trade places several times when it comes to the performance crown for single core GPU's. For a while now Nvidia has been ahead in raw GPU power and ATI has been a little behind in raw power, but ahead in DirectX (DX 10.1). With the introduction of the 5870 it appears the crown has changed hands once again and ATI's 5870 in now the most powerful single core GPU around."