30?C (86?F) to 63?C (145?F) is the typical temperature range you'll find CPUs running at with proper ventilation. Although, according to the manufacturer of your board, "the 'safe limit' for the CPU is between 20->45?C." http://tinyurl.com/6ln935
That sounds awful optimistic to me.
Is the temp you quoted from the CPU?
My P4 runs at 50?C avg., while in another desktop a quad core runs at 58?C. After an hour or so of high-graphic video gaming, the CPU will be around 66?C. I feel very comfortable with these temps.
Of course, you could always easily lower the temp by adding fans or replacing the ones you have with more efficient ones. Having more than one pulling air in and others pushing air out helps. Cleaning them occasionally is also a good idea.
If your CPU spends most of its time in the 70?C+ range, I might be concerned. But I think you are fine.
However, your concern is understandable. Since heat does definitely effect the life expectancy of components. Plus, cooler temperatures typically equate to faster operation of drives, & CPUs.
Additional note: One of the most common sources of excessive heat inside a case is the video card. Make sure it has the best ventilation/air circulation that you can give it.
