My iMac has 4 memory slots - it came with 2 standard at 2GB each. I am thinking of adding more RAM so I want to figure out if it's going to work if I just add 1x4GB and leave one slot empty in case I'd like to add more RAM or I have to fill both free slots with 2GBs?
Thanks in advance.
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Fill it up with whatever you can afford. Big chips are bigly money, as Trump might say ;)
Apple recommended guidelines max out at 4 x 4 GB in each slot for a maximum of 16 GB of memory
for your machine specification. However, third-parties have discovered that it actually will support 32 GB of memory using 4 x 8 GB modules. This might shorten the lifespan of your board though. Boo!
You probably know: If not, This is the guide page how to do it.
iMac Intel 21.5" EMC 2428 RAM Replacement
If you can get your RAM off ifixit, return the favour:
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Be careful!! The i3 CPU model can only go to 16 GB. The other factor is you need the newest system firmware (EFI) which was part of Sierra.
I bow to your deeper knowledge. Great Catch.
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You really need to use two DIMM's but they don't need to be 2 GB modules. You can mix different pairs to the max of 16 GB.
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So I can't leave one slot empty and just fill the other one with 4GB? I wouldn't like to add more than four.
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Your systems specs: iMac12,1
by Dan