I also now have a dead Dual 2.7 thanks to cooling leaks, the power supply, logic board and processors have to be replaced at a cost of R18,000 ($2522). What is worse is that the Apple Repair centre when they received the system first told me that the power supply was kaput and the repair woul cost R2420, ($339), so I authorised the repair, when they installed the power supply they then told me that the logic board was also kaput and this would cost an additional R7,890 ($1105) so I also authorised this repair and when they install that, they then tell me that the processors are damaged giving me a totally unacceptable total repair cost in excess of R18,000. Had I been given this information at the outset I would have just thrown the bloody thing away. My drives were OK by the way. That may well be my last Mac