"Open-source code supporting the AMD Radeon HD 6000 "Northern
Islands" GPU hardware has been available since January, but only in the
past few days has this Linux code matured to the point of being stable
and useful for testing. In this article are our first benchmarks of the
AMD Northern Islands and Cayman graphics processors using the
open-source Mesa Gallium3D driver and comparing its performance to AMD's
proprietary Catalyst driver."