Yup that seems about right for the current PTU build. It probably has a LOT of debugging flags set so is not really representative of a non-PTU client.

The game + OS is definitely going to cause a 16GB system to page quite often (even more so if you have other apps/browser+tabs open. Honestly right now I wouldn't put together a gaming system with LESS than 16GB of RAM, 24-32 is what I have on my gaming systems - but I do test a lot of Alpha and pre-release. Operating System overhead is definitely INCREASING as well these days, so if AAA titles with lots of graphics and 3-D models and textures are your thing - you are probably going to start needing more than 16GB of memory in the next couple years.

Taxman

"Any group is weaker than a man alone unless they are perfectly trained to work together."
- Robert A. Heinlein, Starship Troopers