RAM Adjusted Desktop Starter
When booting up, a prompt will appear offering to prevent XFCE from starting. Users can also manually press
Ctrl + C for the same effect.
By default, Whonix-Gateway is configured with 768 MB virtual RAM. This can be reduced on systems with low available resources.
- If total RAM is more than 512 MB, the default desktop environment (XFCE) is started.
- If total RAM is less than 512 MB (for example, the minimum 256 MB RAM requirement), XFCE (lightdm) is not started. 
Users with low RAM resources should find this convenient because Whonix-Gateway RAM can be reduced to 256 MB and still function. Further, if something needs configuring or checking, 512 MB RAM can be assigned to automatically boot into the graphical XFCE desktop. Additional settings are available in /etc/rads.d/ to configure this feature: additional RAM can be added (but still not choosing to boot into a desktop environment), different display managers can be used and so on.
- Whonix-Gateway can work with as little as 128 MB RAM, but resource intensive operations like kernel package upgrades that rebuild the initrd leave the virtual machine in a frozen state.