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Upgrade Ram for iMac 21.5 4K 2017

Hello everyone, I want to upgrade ram for my iMac but I do not know what brand should I buy. I had a conversation with Apple's online support and they said ram of iMac 27 and 21.5 does not appear the same therefore is there anybody give me recommendations for this situation?

Thank you very much.

If this is your iMac then it seems the RAM can be upgraded:

https://everymac.com/systems/apple/imac/specs/imac-core-i5-3.0-21-inch-aluminum- retina-4k-mid-2017-specs.html

*8 GB of RAM is standard and reported as onboard with an optional upgrade to 16 GB of RAM at the time of purchase for an extra US$200. However, in a pleasant surprise, this memory actually is not onboard and can be replaced or upgraded after the initial purchase of the Mac, it's just unnecessarily complicated. This model can "unofficially" support 32 GB of RAM.

OWC a trusted vendor seems to have the modules you need:

Memory Upgrades for iMac 21.5-Inch 2017

最后更新：2017-10-07 23:33:30

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