hey I was wondering if it would be possible to swap my current cpu with a new one? I have an extra cpu and heatsink layin' around that I never used but am not sure if my prebuilt vaio system would be able to work with it... Any idea how I can find out? I tried contacting sony but they're not very helpful when it comes to swapping factory parts such as cpu. I have a Vaio PCV RS-420 with a 2.8Ghz HT intel processor. The spare CPU I have is a Pentium D 840 I believe... 3.0 or 3.2Ghz... not sure Can I swap these around? If so, is it even worth the effort for this upgrade?