atidxx64.dll has 48 known versions, the most recent one is 8.17.10.0362. The average file size is about 4.22 MB. This is a .NET Common Language Runtime (CLR) assembly.
atidxx64.dll is the Radeon DirectX 11 Driver for ATI video cards with DirectX acceleration support. This is the 64 bit Windows version of the driver.
United States installs about 56.19% of ATI Technologies Inc. Radeon DirectX 11 Driver.