As per my other posts my GTX570 card doesn't drive two monitors with Nvidia web drivers any more so I am contemplating purchasing a new graphics card. My system is a Mac Pro 3,1 & my main criterion is maximum CUDA performance for video editing in Premiere Pro. I am not interested in Windows in any shape or form. I do not need a grey Apple boot screen. What is the current state of play with Nvidia cards? Last I heard the GTX570 was still the fastest CUDA card even though the GTX670/680 had more CUDA cores. There have been another couple of generations of Nvidia cards since so perhaps things have changed. A cool running card with very quiet fans would be nice but not essential.