hi all, i have got new ram for my mac mini 2009 model from a friend. mine is 1067mhz and the ones he has are 1333mhz. will this be a problem and also they are 2x 4gb sticks, will 8gb be ok on this model?
Yes, they will work. 8 GB is the maximum for that model, and thus they will work too.
I have a 2009 MBP with 8 GB of 1333 MHz RAM and it works quite fine.