I have a Gateway gt5622 desktop computer that I am working on for someone else. It has one of those cpu fans that will spead up if as the cpu heats up. It started racing fast all the time. I decided to replace the fan and heat sink. However it still heats causing the computer to freeze up. I have researched this online and found many people with the same problem but noone posted a solution. I am inclined to think that it is either the Cpu or the Motherboard but as it is 4 years old I am hesitant to recommend putting that much money in. Any thoughts would be helpful.