Hey guys, trying to decide what direction to go in with my upgrades.... I currently have an asus m4a88t-m motherboard, amd 6x 1055T cpu, Nvidia gtx 560 ti, I am mainly using the computer to play games, and video editing, photoshop work, I play at 2560 resolution and notice the pc has a hard time keeping up... my motherboard only allowes 1 graphics card. so adding another would mean another board... are there any upgrades I could do to my current system to gain 20%+ performance? or am I better off buyin an i7 board and another gtx 560ti?