When you download Civil 3D today, you aren't just getting a desktop application. The download process is heavily integrated with (part of BIM 360).
The download page now clearly delineates the difference between "Recommended" and "Minimum" specs. A feature worth noting is the disclaimer on large datasets: the download page warns that while the software runs on minimum specs, processing large surfaces or pipe networks requires the recommended hardware tier. download civil 3d
How to Download & Install Civil 3D