NVIDIA suggest a 600w for a 1080Ti, but with an I7 at only 3.2Ghz. Your run at 4.7Ghz. 650w is your minimum. Get a 750w if you can.
https://forums.eagle.ru/showpost.php?p=3714338&postcount=52
https://forums.eagle.ru/showpost.php?p=3713321&postcount=51
Seasonic Focus, Focus Plus, and more. Corsair VX, TX, TX V2, TXM. Anything OEM of Seasonic or Super Flower (Europe, Asia). Flextronics, Channel Well and Sirtec are good too. https://whirlpool.net.au/wiki/psu_manufacturers