While you can get away with 8GB if your computer use is relatively light, if your iMac will do any amount of work, either professionally or for school, you'll want to upgrade to at least 16GB of RAM. How are you going to use your iMac? Most people will be fine upgrading to 16GB of RAM. When thinking about how much memory you should actually get, it comes down to a question of purpose. Every other spec is going to be the same except for the actual amount of memory you get.

You shouldn't notice a difference.Īs long as the RAM you get follows these specs, the only decision you have to make is about capacity. It has more to do with how some companies round a particular memory value than any actual spec. This memory is still compatible with your iMac. Instead, you'll find RAM with PC4-21300, but don't worry. This was after I had just taken it out so you can see the dust at the top on the USB connections.Now here's the thing: nobody sells RAM marked with PC4-21333. You can see the slots for the RAM and the heatsink for both the processor and GPU as well as the PCIE slot at the top of the picture. I have recently added a photo of the logic board I took out from my iMac below when I was taking it apart for anyone wanting to see what it looks like after removing. If you only want to upgrade the normal SATA HDD to a SSD it doesn’t take as long as you only have to take off the Display assembly. I used ifixit’s kit (not a plug) and it was a long job but can be done as long as you are careful when removing the display assembly and also when putting it back on. To get to the RAM and the Blade drive I literally had to take the whole Mac apart and remove the logic board as both the RAM slots and the Blade type drive are not accessible without doing this. I also added a 500GB blade SSD from a MacBook Pro that I had spare from my late 2013 MacBook Pro as my iMac version has a blade SSD slot on the logic board. I have a late 2013 iMac with 16GB RAM and upgraded 2.9 i5 processor that had a Fusion Drive setup.

Best ram for imac 27 late 2013