[tomek@vz]

Moving past games, even applications such as Adobe Premier CC which in our test pushed system memory usage to 12GB, saw little advantage to using 16GB of system memory opposed to 8GB. However, we did see a significant drop off when lowering the system memory to just 4GB. Users who do encoding will appreciate having no less than 8GB of memory.

http://www.techspot.com/article/1043-8gb-vs-16gb-ram/