Recently I've been experiencing freezing problems with my iMac, which I think is due to heavy processing issues. I've been noticing just using a few things like eyetv and google chrome will jump my activity up to 100% CPU usage and freeze my computer. I was wondering if I should take it in to get it checked out? A few times it has crashed and I would have to reinstall OS X. I use Snow Leopard and have 4gb of ram.