Considering buying a 5,1 mac pro from ibuildmacs, with a 980Ti. And I've got a few questions; 1. If I were to use a 5.25 Inch Bay PSU (which is powered by a Molex connector), could I put it into the second disc drive port's power connector with a Sata power to Molex adapter? 2. If yes to question 1 (I expect it to be a yes), could I install a second 980Ti and use an sli bridge to SLI the GPUs? In other words; Does El Capitan support SLI? Also if this is the wrong section, mods please move it to the proper place.