I can't test it right at the moment. But normally - on this project - it's around 1,5-1,7 GB RAM.
What do you think? Could it be the number of opened (visible in the background) vsl-instances? Because all my used plugins are "open". Let's say, I used around 15-25 instances of the suite-plugins. Did you already test the suite with such an amout of opened instances? :/
I could give detailed feedback in the evening...