I've been running a evga 780ti on water and just installed a gigabyte 980 on a corsair 750M PSU. Am I in the danger zone?

I've got the 980 at ~65 tdp and the 780ti is at 100.
Settings:
780ti 1230 GPU, 1774 Mem, 1.15v (41 degrees)
980 1500 GPU, 1752 Mem, 1.256v (53 degrees)
Reason I'm asking is I thought I heard the 980 fans sag for a second.
I currently have 2 970's which probably draw as much as 2 980s since they're overclocked, as well as a 750ti and a whole mess of hard drives, water pump, fans, etc on my 850w psu. I think you'll be fine as well. I'll be testing power draw sometime in the next week or two when i get a chance and i'll report my findings.
Since you have the windforce with leds, go into geforce experience under led visualization settings and click on the edit option to change the led settings. There you'll see a button you can click to show the cards current usage. I bet it is more like 98% TDP on the 980, not 65. I think the 3rd party apps are still not reporting it correctly.