I recently came into possession of a 27 inch mid 2011 iMac. It only has 4GB RAM and I have been pricing compatible memory modules online.
I then remembered I also have a 13 inch mid 2012 MacBook Pro that was damaged some time ago. It has 8GB RAM that I have no reason to suspect has any faults as it worked fine before the damage which was not anywhere near the bottom case. So I thought I would investigate the types of memory modules the iMac and MacBook Pro use.
I found the iMac uses 204 pin PC3-10600 (1333 MHz) DDR3 SO-DIMM modules.
I found the MBP uses 204 pin PC3-12800 (1600 MHz) DDR3 SO-DIMM modules.
Obviously I'm thinking that if I can use the MacBook Pro RAM in the iMac I can save some money and it's a good way of recycling.
I understand this RAM would not operate at 1600 MHz in the iMac. My questions are:
- Would the MBP RAM work okay otherwise?
- If it would work, does it make a difference if I add them to the original RAM so I have 12GB in total, or will I have to remove the old modules and just use the 8GB instead?