f/fgeorge wrote:

Sounds like you either have some cleaning to do within the machine,
the cpu could be overheating because of the demand on it or you have a
bad memory chip. I would look at cooling first.

I'll second the cleaning recommendation.  I take the canned air to my machine on a monthly basis.  Gets rid of some obnoxious dust bunnies and I notice that the machines run appreciably quieter after the cleaning, too.  Heat and delicate electronic components do not generally get along well.