Autodesk Autocad 2018.1 -

A minimum of 8 GB is required, but 16 GB is recommended for 2D drafting and 32 GB for complex 3D projects .

To ensure stable performance, your hardware should meet these AutoCAD System Requirements : Autodesk AutoCAD 2018.1

Allows you to categorize views, assign visual styles, and define backgrounds. A minimum of 8 GB is required, but

The 18.1 update focused on workflow automation and improved external file handling. assign visual styles

Windows 7 SP1 (with KB4019990), Windows 8.1, or Windows 10 (64-bit only).