Please suggest an appropriate video card to drive two NEC 32" 4K monitor (PA322UHD). I'm using a 2010 MacPro (upgraded to 12-core 3.33) with factory 5770 card. Looking to upgrade my Apple 30" display to the 32" NEC 4k monitor (possibly 2 of them), and not sure which video card to choose. My requirements are that it should do 4k at 60hz, and not have loud fans. Also, I do not game, using mainly for Photoshop and other imaging software. Thanks for any help or suggestions.