Ctrl+shift+escape and you can watch your UC and RAM use and stuff ;p
More than 8gb of Ram isn't very usefull actually, windows 7 + basics softs use approximatively 1gb, that makes 7gb left for games and softwares. If you're not planning to have 3 or 4 screens and do a thousand stuff at the same time you can stick with 8gb
I don't see the point to be able to play 2 games, watch a movie and browse the internet at the same time, unless you have 2 brains and 8 eyes ;o
yeah sure add vodka
also about pc build
i7 3000 series will be proper choice
High settings
Lower
Temperature at full load
Some benchmarks at OC