Having a power-supply watts rating equal to what the rig is using will last the 10 year warranty just the same as purchasing increased watt ratting that you won't use.
i5 8600K OC 5.0GHz
Motherboard Gigabyte Z370-HD3
G.SKILL Ripjaws v 16GB F4-3200C14D-16GVK XMP Speed 3200 14-14-14-34
EVGA GeForce RTX 2070 XC ULTRA GAMING
ASUS VG279Q 27" 1920x1080p 144Hz IPS panel Gsync compatible