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2020 iMac 27" RAM Upgrade Question. Are all "2666Mhz" RAMs automatically "PC4-21333"

I'm a new iMac owner (and it's also my first computer that I bought for myself) and have minimal experience in upgrade parts. So I'm confused if there might be incompatibility issues with "2666MHz" rams?


This DDR4 - 2666Mhz ram has a label PC4-2666V so I wonder if that is incompatible? or all SO-DIMM DDR4 - 2666Mhz rams (260-pin) are automatically compatible with the last intel iMac?


This is the most "compatible" RAM I've seen in my country's online stores that also fits my budget, and I just worry that it might be incompatible or not optimized for my 2020 iMac.


Thanks in advance

Posted on Aug 12, 2020 6:50 PM

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Question marked as Top-ranking reply

Posted on Aug 13, 2020 5:40 AM

You can refer to the chart below, in terms of terminology.

DDR4 2666 has the Bus bandwidth of 21333 (mb/s).

The dices are in your hand if you plan to purchase memory modules of your choice.


And NO, all memory modules are not created equally --> not all compatible with Macs.

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2020 iMac 27" RAM Upgrade Question. Are all "2666Mhz" RAMs automatically "PC4-21333"

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