Hey guys I am running a Corsair gs700 watt psu, phenom x4 955be,a gigabyte 6850, and an ecs a790gxm-ad3 as my motherboard. I am using a 1280x720 resolution. My birthday is comming up and my parents want to buy me a gift, so I was wondering if another 6850 for crossfire would make a difference or go for a 7850. That is only if I would see an fps improvement in games. I mostly play gta san andreas, saints row 3, and sleeping dogs. I want to keep it under 200 dollars and im willing to get a nvidia card if needed