How to get 64 GB DDR3 RAM into iMac late 2015?

[Eugen Mezei]

The 27" 5K iMac model late 2015 is specified to a max. RAM of 64 GB. Having 4 slots and needing DDR3, how can one get over 32 GB?
I never saw DDR3 modules over 8 GB that are not ECC.
Can this model accept memory from the world of servers? There 16 GB modules would not be rare. Or did indeed somebody produced DDR3 modules of 16 GB for it?

 

[Juicy Box]

See this:

64.0GB OWC Memory Upgrade Kit for 27-Inch 2015 iMac

Upgrade your late 2015 27-inch iMac memory up to 64GB and save money by trading in the original factory RAM for a rebate.

eshop.macsales.com

 

[jagolden]

I have the 2017 model.
I simply found the RAM spec and ordered 4 16g modules.

 

[Eugen Mezei]

See this:

64.0GB OWC Memory Upgrade Kit for 27-Inch 2015 iMac

Upgrade your late 2015 27-inch iMac memory up to 64GB and save money by trading in the original factory RAM for a rebate.

eshop.macsales.com

So they exist. But wow, at that price one can buy a 2019 or 2020 and use DDR4.

Let me reformulate my original question: Will ECC RAM accepted by those older models?

 

[Juicy Box]

But wow, at that price one can buy a 2019 or 2020 and use DDR4.

I am sure that you can find it for cheaper, OWC isn't usually the cheapest.

Besides, a base model 27" 2019 or 2020 iMac is going to cost a lot more, while not performing a whole lot more than your 2015 iMac.

 

[Nguyen Duc Hieu]

They are rare, indeed.
I found only 1 shop in my town offering the 16GB module of DDR3L 1600 SODIMM.
These are old RAM sticks salvaged from decommissioned workstation-type laptops.
They charge ~50$ per stick.

 

[The_Croupier]

Are you cashed up?

32GB SODIMM (2x16GB) 1.35V DDR3L 1600MHz Lenovo ThinkPad T460 6TH gen | eBay Australia

If you receive a defective product, we will replace it with a working one or give your money back. US law to do it otherwise. We have no way of knowing or to be able to assist you with your country’s rules and regulations.

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