Autocad 2012 X64 -64bit- is a version of the Autocad software that is specifically designed for 64-bit operating systems. This version is optimized to take advantage of the increased memory and processing power of 64-bit systems, allowing users to work with larger and more complex models.
As AutoCAD 2012 is a legacy product, Autodesk typically provides support and activation through these official channels: Where to find your Autodesk Revit 2012 Product key Autocad 2012 X64 -64bit- -Product Key And Fix Xforce