Hello
Changing my 2x2 GB Memory sticks to 2x4 GB I have found out that there was a lot of dust in the MacMini after only 2 years of use
So you better check if your Macmini is not full of dust.
To do this look at the instruction to change memory : http://support.apple.com/kb/HT4432?viewlocale=en_US&locale=en_US#1
you will see the dust after removing the black round thing
MacBook Pro M3 MAX 128 GB 8TB - 2 x 48" screen --- Logic Pro --- Mir Pro 3D --- Most of the VI libs, a few Synch... libs --- Quite a few Kontakt libs --- CS80 fanatic