ASG V7 has lots of new features, all applications that run need RAM, as well es the configuration handling, needs to use more memory as the potential configuration is bigger.
On top of that, ASG V7 has a selftuing mechanism, which reconfigures the system parameters based on available RAM to give best performance on that kind of system.
If you have a system with more RAM, than we will use it to deliver faster Service. On devices with less RAM we will reconfigure the applications to use less.