My PC just recently has started running way too hot to keep stable. I bought a Corsair H80i water cooler for it about a year ago, but I have an AMD Phenom II X4 965 that is idling at 82° C. I have cleared all the dust out of the machine and reapplied thermal past but I'm still sitting in the 80s at idle speed. Is there something I could possibly be missing? I'd like to avoid taking it into a shop if possible, but can as a last ditch effort.