Is there a benefit to having 2 GPU's in my mac pro? I replaced a working 8800GT with a 5770. I have two monitors hooked up the the 5770 a Dell u2711 and a u2312. What I would like to do is increase my open GL performance. Should I hook up the u2711 to the 5770 and the u2312 to the 8800GT. Any advice will be greatly appreciated.