I have an i7-3770K myself, and I've never even had to overclock it, personally. I have an ordinary GTX980, and a 550W psu powers it all just fine, even under full stress-test load. So I don't think you'll have any problems with wattage either. But yeah, the 3770 is an incredible chip. It's extremely powerful, and intel has really been slacking since gen3. My 3770k maxes my 980 without even coming close to load, without an OC, so I think you'll be fine with the 980TI as well. The only time you may need more than the 3770 is if you plan on editing video or streaming AAA games.