No signal after extended period of no use?

So I recently completed my build (thanks /u/Anorexic_Dildo!), but I have one bug left that's been really annoying me.

So I have a 6700k on a Z270 mobo, with a GTX 980Ti on it as my GPU. Before I go to bed, I turn off my monitors, but my Mac isn't set to go to sleep (Power Nap is turned off too). When I get up in the morning, I turn my monitors on, but I get no signal. I can TeamViewer into my computer and everything works, but I can't get any display out. I've read something on Tonymac about black screen fixes, but I can't put together what anyone is talk about in there. Anyone have any suggestions?