I just leave on auto tuning. If it's chilly light jacket weather I like it around 500-700 watts. Baseline is 800 and seems to be a good set it and forget it wattage. I'll use 900-1200 on cold days. Higher than that the fans get a little annoying, though still bearable since I did the noctua 140mm & 60mm upgrades. Wouldn't want to run more than 600 on stock fans if I'm trying to sleep... they're loud.