As some of you know, NVidia is dropping support for more than 2 cards in Implicite LDA. However, applications developed in explice can still control more than 2 cards because they are handled by the application. (DING DING… BTW, if you were scarred your new 1080 wont support more than 2 way SLI, it does. Lots of misinformation about this. It has to do with how the game or application is developed, NOT the cards themselves. There is however an application from nvidia you will need to unlock the third, or more cards in order for them to be functional in explicite).
So, my question for everyone here is: Does anyone know if cycles runs implicite or explicite for multi GPU rendering? Since you can chose which cards to render with I wuld think explicite but since im not sure id really love to ask before I buy 3 all at once vs waiting on the third.