The Architectural Leap: Autodesk AutoCAD 2011 (64-bit) Autodesk AutoCAD 2011
Because 2011 lacks telemetry and cloud sync, it runs exceptionally well in virtualized environments (VirtualBox/VMware) where a 64-bit host OS allocates 8GB RAM to the guest. This is common in government and defense contracting where internet access is restricted.
Autodesk AutoCAD 2011 (64-bit): Power and Precision for Modern Design
Test File: A 250 MB civil engineering drawing containing 15,000 line segments, 500 polylines, 200 3D faces, 30 external references (XRefs), and 4 raster images. Hardware: Intel Core i7-870 (4 cores), 12 GB DDR3 RAM, NVIDIA Quadro FX 3800.