What is the recommended total PSU Wattage rating for EVGA GeForce GTX 1080 Ti SC2?

i7-3770 TDP is 77W, which roughly translates to ~77W power consumption; EVGA GTX 1080 Ti SC2 TDP is 220W, for headroom 50% increase to ~330W power consumption.

You'd be looking at ~407W max. power draw at the +12V rail with that setup.

Recommended PSU Wattage Rating: 550W to 600W is more than enough.