I have dual 366a's oc to 550 and have been at 104 to 111f since day one,about a year ago.I dont think 111+ is a problem with my system.It has two fans blowing in/two blowing out two on the harddrives and one each(alpha) on the cpu's.I think 120f would be too high.I have a p3 not o/c and its at 85-90f.But I also had a 300a@450 that was 114f,and it ran fine.