I have a early 2009 mac pro 4,1 which has dual gt120 cards inside of it. So I have a total of four video outs (2x DP and 2x DVI). Very happy with these slim, silent cards - the problem is that they won't drive a newer 4k display. I *still require* four video outs ... but I don't have high demands for GPU/graphics ... I would love to use a single-slot card with nothing but displayport ports. Fanless would be a bonus ... Does that exist ? Is there a single slot card, with dual 4k@60 DP ports (v1.4) that I can use in my mac pro ? Again, fanless would be a bonus, but the real issue is being single slot since I need other slots free for PCIe SSD and USB3 card .... Thanks.