Translations:ATI FAQ/4/en
From Gentoo Wiki
Many AMD/ATI boards (but not all) are supported by Xorg, including 2D/3D accelerated features. For newer GPUs since GCN (Graphics Core Next) Generation 1.1 (Southern Islands and newer) drivers are provided as open source AMDGPU and closed source AMDGPU-PRO. Both have excellent 2D and 3D accelerated performance.