Apple on Tuesday unveiled new iMac models that support up to 64GB RAM. Apple charges high prices for RAM upgrades, though, but luckily, there are do-it-yourself options for replacing an ‌iMac‌'s memory after purchase.

Other World Computing this week announced memory upgrade kits designed for the 2019 27-inch 5K iMacs, which let you upgrade your available RAM more affordably.

27inchimac 1
There are three RAM kits available depending on your needs:

- 16GB Kit (8 GB x 2) OWC2666DDR4S16P - $118.88

- 32GB Kit (16GB x 2) OWC2666DDR4S32P - $229.88

- 64GB Kit (16GB x 4) OWC2666DDR4S64S - $449.99

OWC's RAM kits let you save 40 to 60 percent over Apple's upgrade pricing, and there is an option to trade in the existing RAM in your machine to get a discount.

OWC says that it is testing 128GB of memory in the 27-inch ‌iMac‌ models and will confirm whether or not the machine supports it in the near future. So far, the 27-inch ‌iMac‌ has been able to see 128GB of memory, which seems promising for even further RAM upgrades. OWC offers a lifetime limited warranty for its memory kits, along with a 30 day money back guarantee.

Note: MacRumors is an affiliate partner with OWC. When you click a link and make a purchase, we may receive a small payment, which helps us keep the site running.

Tag: OWC

Top Rated Comments

tevion5 Avatar
29 months ago
Can't recommend OWC enough. Just got a 256GB SSD upgrade for my aging Power Mac G5 Quad. Timely delivery and good prices. Their continued support for older Macs especially is fantastic.
Score: 7 Votes (Like | Disagree)
pavelbure Avatar
29 months ago
As tempting as it may be to save a few bucks, keep your old ram. You never know when you may have to get your iMac repaired or replaced.
Score: 6 Votes (Like | Disagree)
RyanXM Avatar
29 months ago
As tempting as it may be to save a few bucks, keep your old ram. You never know when you may have to get your iMac repaired or replaced.
Replacing your RAM with third party RAM DOES NOT, I repeat DOES NOT, void your warranty or AppleCare+. If an employee at a store tells you this, they are flat out LYING. I know this as I previously worked at an Apple Store. If they find that your RAM is causing an issue, their Family Room Team ie. Genius Bar, should have test RAM (Known Good) to ensure that all other components are functioning.
Score: 6 Votes (Like | Disagree)
MauiPa Avatar
29 months ago
I feel like the RAM in the 2019 model is literally interchangeable with the RAM in the 2017 model. Literally the only change in these 2019 iMacs is a new processor and a new GPU option. iFixIt, prove me wrong.
if you read a spec sheet, you don't need ifixit to tear it down. The spec for the 2017 27 iMac is

Technology: DDR4 SO-DIMM 260 Pin
Density: 4 x 16GB (16384MB)
RoHS: Yes
Pin Count: 260-pin
Op. Temp.: 0C to +85C
Data Rate: DDR4-2400
Speed: PC4-19200
CL: 17
Voltage: 1.2V
ECC: Non ECC

while the 2019 iMac is \
Technology: DDR4 SO-DIMM 260 Pin
Density: 4 x 16GB (16384MB)
RoHS: Yes
Pin Count: 260-pin
Op. Temp.: 0C to +85C
Data Rate: DDR4-2666
Speed: PC4-21300
Voltage: 1.2V

This is from OWC. Will it work? Hey its different, the 2017 is slower, beyond that, ask google
Score: 3 Votes (Like | Disagree)
B4U Avatar
29 months ago
Replacing your RAM with third party RAM DOES NOT, I repeat DOES NOT, void your warranty or AppleCare+. If an employee at a store tells you this, they are flat out LYING. I know this as I previously worked at an Apple Store. If they find that your RAM is causing an issue, their Family Room Team ie. Genius Bar, should have test RAM (Known Good) to ensure that all other components are functioning.
To add to the point, I have an out of warranty iMac with the OWC RAM and needed a repair. The genius bar guys took a look and still performed all the necessary repair with those RAM in place.
Score: 2 Votes (Like | Disagree)
Guyp16 Avatar
29 months ago
Replacing your RAM with third party RAM DOES NOT, I repeat DOES NOT, void your warranty or AppleCare+. If an employee at a store tells you this, they are flat out LYING. I know this as I previously worked at an Apple Store. If they find that your RAM is causing an issue, their Family Room Team ie. Genius Bar, should have test RAM (Known Good) to ensure that all other components are functioning.
I’m ex Apple too and can confirm RyanXM’s points.
Score: 2 Votes (Like | Disagree)

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