I know what you did, you left it overclocked, you need to set the clocks to default before you take it out of the pc and put it in the oven
if you left it overclocked you should have compensated and put the oven to gas mark 3
... now you know for next time
if you left it overclocked you should have compensated and put the oven to gas mark 3
... now you know for next time