Hi there, After 4.5 my MacMini literally bit the dust after being crash-happy for a week or so. On opening it I found that the cooler was covered in a thick layer of dust (not really a suprise) so I do have the hope that I only fried the CPU Orginally it was a 1.86 CoreDuo but if does still work why not go to something more beefy. AFAIK I could use an Core2Duo up to 2GHz but Intel's naming/typing convention is more than confusing (to say the least). Time to get the point : For what numbers/names should I search in eBay ? Best option would: - buy low end CoreDuo or CoreSolo for an Euro or 2. - test wether it works - pay more for the best CPU that can be bought at a reasonable price.