Hi fellas. I'm currently on a rig whichs' specs are: -ASUS M5A97 -AMD Phenom II x4 970 BE -Kingston HyperX 8 GB 1600 MHz DDR3 RAM -SAPPHIRE HD 7870 GHz Edition OC -Aerocool VS-9 550W (which is an engineering failure i suggest you to stay away from this case at all costs) I was wondering about doing CF with another HD 7870. Would you reccomend it? Would my sistem bottleneck? And what kind of PSU should i get fot this, how much power should it give?(600-700W etc.) Or would you suggest me to get an upgrade like GTX 660 Ti. I may switch go Zotac GTX 660 Ti AMP!.