(adsbygoogle = window.adsbygoogle || []).push({}); I want to have the best BF3 experience in Ultra full 1080p at 70-80 FPS and play most games on Ultra smoothly without a problem. Will this build do me justice? Does it matter if i won't be using it all, we it decrease performance?

Specs:
INTEL Core i7 3770K 3.5GHz
Intel Z77 Chipset Motherboard Dual Channel DDR3
16GB Dual Channel DDR3 1600MHz RAM (Is 12GB enough or should i stay 16GB?)
nVidia GeForce GTX680 2GB (Don't need 4GB do i?)

Another quick question: Does BF3 run better/smoother on the HDD apposed to buying the Disc or it doesn't make a difference?

Thank you!