My main purpose is gaming but I don't really ever do more than one thing at a time (unless having Facebook or google or something up while playing a game). With that said I know for sure my Quad is an "Intel Core 2 Quad CPU Q8200 @2.33 GHz 2.33Ghz" but as for the other one I'm not sure. I know it is a Duo Processor and it could be anywhere from 2.66-2.99 GHz. I only stated 2.66 to show the minimal. The reason I ask is not because I would be replacing my quad with the duo but I'm using my family PC which has the Quad and I am possibly getting my own PC which would come with the duo and want to know what to expect from it.