speed fan sucks use core temp - the readings on the q9450 cores are significantly higher then the asus probe
core temps of 50-60c are normal for oc with water 4ghz/9650 or 3.6ghz/air or bad system with poor cooling stock - max temps of 65-72 again normal per core
usually core one runs hot - usually you find a group of cores that run cooler
i use probe/core temp/speedfan together in testing
no - as far as cores going over 70c at max its not an issue. running a pc at 70-75c every day all day, is different. you would lower the life span. i limit my max to 75c and do not ship systems unless they run below 72c at max output in a hot room 82-90f plus.
i run systems hot for years with out issues with out turning them off - never one pc has failed that i own, built sold or shipped.
i have shipped pc that ran 75c, i.e. "the world fastest air cooled computer" the 965EE 4.5ghz dual core -- these systems all run and have run for years they hit 75c at max. but then again, in cool room under nomal conditions they see 45-55c normally