What is the ambient temperature of the room that the computer is in? Anything over 80 degrees Fahrenheit is potentially dangerous to computers. Are you running it with the case open? Not a good idea as a closed case is designed to maximize air flow. Also, are your fans setup in a push/pull configuration? There is much debate on how to properly set this up, but generally you have one fan sucking air in on the bottom and the other fans blowing air out. Or, and this is where people tend to get agitated, you have one fan on the top/back blowing air out and all the other fans sucking air in. Either way, you do not want all the fans blowing out, as this will greatly limit your cool air intake. And you do not have all of your fans sucking air in, as this will greatly reduce the capability of expelling hot air.