Gaussian is copyrighted software. It is not freeware. Downloading it from unauthorized sources (torrent sites, university "share" folders without a license) is illegal and a violation of the software license. This guide outlines the legitimate method for licensed users.
Memory: At least 2GB per core, though 8GB+ is recommended for complex DFT calculations. gaussian 16w download upd
Before downloading Gaussian 16w, ensure that your system meets the minimum requirements: Right-click the Gaussian 16W shortcut on your desktop
If you have already purchased a license, you can obtain the software through these official methods: Memory: At least 2GB per core, though 8GB+