i finally got around to overclocking my 1080 (Founders Edition) I could only get a stable overclock with a 200mhz core offset, and 350mhz on the memory. Is a 120% power target safe? Under really intense loads it's in the 80's C but everything seems stable. My chassis is the Phanteks Enthoo Evolv ATX TG and it seems to handle the heat well, there's a rear fan almost right next to the 1080 pushing a lot of air out, it's just fairly loud under load. What setting up a custom fan curve help a bit?