@JackJones: You are good. The i5-4690 only has an 88 watt TDP. Buy the new 980 and don't stress it.
And if you wouldn't mind, once you have both GPU's going in SLI, could you check your CPU utilization during game play, if it's not too much to ask? I'm personally curious to know how far two 980's will push the 4 cores on your i5. I think you're going to be in for some great FPS.