PC Games Hardware received a presentation from AMD that compares the ATI Radeon HD 5870 with NVIDIA's upcoming Fermi GPU. You can check it out over here.
With a presentation, which titled Ati Radeon HD 5870: Lean & Mean - Shipping Today, AMD frets about Nvidia's Fermi architecture that had been announced at the GTC 2009. As usual for such presentations the advantages of one's own product are spotlighted - sometimes even in ludicrous ways.
Especially juicy is the fact that AMD criticizes the "PDF status” of Fermi on almost every slide: While Nvidia has only announced the architecture, the AMD DirectX 11 graphics cards are already on sale.