Yep, says it right in the Nvidia control panel. The G-sync monitor has to be set as the primary. One of the first things I noticed when I picked up my x34.
I saw that but whats the reason for it? Like games like GTA V let you pick which monitor the game will be displayed on. Curious does nvidia state that for more of a default?
I'm not too sure to be honest, this is my first g-sync display and I'm not using a secondary. Id test it for you but I've already sold my last display.