I currently have a radeon HD 6850x2 in CFX and my cards are OC maybe close to a 6870, if i have a good OC, but i think my cards are starting to give out, i was playing Crysis 3 MP beta and i can only play on medium settings with 2x Multi sample rate any higher and ill be on 5 FPS, im currently only getting like around 30FPS, So i was thinking if i get a 7850 or should i go with a Nvidia card like along the lines of a GeForce GTX 560 Ti (Im on a budget of around $200) But the actual question is will Phyx really help me out on games or should i just stick with AMD and get the 7850, And if it matters my current CPU is an AMD FX-6300.