I'm not looking to run stable or 24/7 at 4Ghz, was just a max test to see what the CPU could do. I'm happy at 3.6 & sure I could do 3.7 maybe 3.8, but I fold 24/7 with all my rigs so lower temps for 24/7 "Full Load" use is what I'm after. With air cooling & as hot as it has been here in Ms that's about all I want to do at this time for 24/7 use.