Yesterday ATI announced its new line of GPUs, the X1K family. This family includes the flagship Radeon X1800 XT and XL GPUs (codenamed R520), the mid-range Radeon X1600 XT and Pro GPUs (code named RV530), and the mainstream Radeon X1300 and X1300 Pro GPUs (code named RV515). For a detailed overview, see the articles at ExtremeTech or Beyond3D. ATI has also announced preliminary plans to enable GPGPU development by publishing a detailed spec and a thin abstraction interface for programming the new GPUs.