Turn the power supply up-side down.  If your case doesn't support this option, get a new case that does.

ditch the original 980 on E-bay and get the new Titan X :P
No SLI config headaches and way more VRAM for what is practically the same price as two 980s

Uhhh, first off power supplies blow out the back of the case unless you have modified it yourself or have a VEERrrrryyyy weird PSU. And you could always wait to see what the 980 Ti or amd 3xx series is like.