The e8400 is pretty old with 2cores so if your having problems one way you can use a elgato and set it to record on the elgato and not use system resources a nother way you'll need a crazy amount of hdd space is to record it in raw avi you will loose near no fps not sure fraps can but I know action supports this the thing is minecraft is all on the CPU you can have a low end gpu and still play it