Shame really, I had been folding the last few weeks (Uni halls, free electricity), and today I decided to download CoreTemp... Q6600 was runing at 100'C, eeeek, and throttled right down, explaining why it was folding slowly... So opened it up and had a look at the cooler, full of dust, so will need a good clean out. Should be back up soon, does not seem to have done any damage, but I am slightly concerned as it must have been running at or close to 100'C for the last week without being shut down or anything .