Just so you know, you are way more than "150 watts in front of that".
Your GPU is rated for 165 watts usage.
Your CPU is rated for 91 watts usage.
That's only 256 watts for those two components. When gaming, you will likely peak at somewhere between 300 and 350 watts for your entire system. You could install a second GTX 980 and still have plenty of wattage left.