For reference my 3800+ runs Predictor WU's in about 50 - 51 minutes, my son's 4800+ runs Predictor WU's in about 38 minutes. His system had been down for a week or so due to the new water pump in his cooling system dying. I put the origonal cooling fan back in and removed the 10% overclocking from the bios. He's back to playing Oblivion and crunching for Predictor.