I see that in crafting a detailed reply, I got in late
The short answer to your question is "no".
The reason is that the situation you describe is very unusual.
Which distro are we talking about?
What is the hardware?
What are you doing to run up high CPU loads?
i.e. Running Blender in a PII will have the effect you are talking about - especially with large files. So will running animation software and/or producing DVDs.