This guide covers system requirements, installation, basic setup, and first-run tips for Autodesk AutoCAD 2011 64-bit on Windows (assumes Windows 7 / Vista / Windows Server variants supported at release).
The most significant aspect of the "64-bit" designation for AutoCAD 2011 was memory management. In the 32-bit era, Windows applications were limited to utilizing roughly 2GB to 4GB of RAM. For heavy CAD users dealing with large civil maps, 3D plant models, or dense architectural footprints, this often resulted in "Out of Memory" crashes and sluggish performance. Autodesk AutoCAD 2011 -64-bit-
Transparency Properties: A long-requested feature finally arrived, allowing users to apply transparency to layers and objects just like colors or lineweights. The Practical Impact Autodesk AutoCAD 2011 (64-bit) — Quick Installation &