Adamanta64GB (4x16GB) Memory Upgrade for 2020 Apple iMac 27" w/Retina 5K Display & 2019 Apple iMac 27" w/Retina 5K Display DDR4 2666Mhz PC4-21300 SODIMM 2Rx8 CL19 1.2v DRAM RAM

I love Apple products, but let's face it, they're expensive. I have a 2019 27" iMac and it only comes with 8gb of RAM, which is close to nothing. Why it's still sold with only 8GB is beyond me. If you want to configure your iMac to have 64GB of RAM on Apple's website, it will run you an extra $1,000. Yes, that's not a typo, I didn't add an extra zero by mistake. A full extra thousand dollars. That's completely absurd.Well luckily, Adamanta provides 64GB at less than $300. Not only was it $700 cheaper, but it works perfectly, and I have yet to have a single issue. Installation was extremely easy as you would expect. Just open the hatch in the back, and replace the RAM inside with these. Would definitely recommend this RAM kit. You'll save A LOT of money.

I'm really picky about what components I use to upgrade my computers - but, this one rocks... Apple charges an obscene amount of money for memory upgrades, and given the low price of this memory, I hesitated thinking it wasn't compatible, or I'd get an error code on boot, or it would fail? But, fact is - this memory simply works - at speed - without any errors. I upgraded my 2018 Mac Mini to 32GB from the factory installed 8GB and I do some fairly intensive memory apps for photo editing, and my system has been rock solid since this upgrade. I know this memory brand isn't a "household name" - but, it simply works as advertised and is flawless so far after some hard use. Would buy again, for sure...

This was a snap ! very easy to install

As with other leading manufacturer, did not work when installed and after jostling around cards per Apple instructions.Finally had to remove both original 4gb cards & follow Adamenta's instructions that came with ram. Install one 16gb & boot up. Add 2nd 16gb & reboot. Then add original two 4gb cards & reboot...WA-LA! Worked.Shows 40gb & working at the correct speed.Seems Adamenta knows more about this than Apple! 😁Happy camper! Thanks Adamenta, good job!

Couldn’t get my 2019 27” iMac to reboot no matter how I configured these. I tried every solution anyone ever posted to the internet and no dice. Unfortunately I’m past the return window so I’m out the cash too. Super frustrating.

Purchased a 27" 2019 iMac with 16GB RAM in it from Apple, then added this for a total of 48GB. I added this before the first boot up, so I can't compare before & after performance, but compared to my older Mac with 24GB, it's noticeably faster. Definitely worth the cost - especially compared to adding it at Apple.

Works great, and it's a huge improvement - the original 8GB that came with my iMac was definitely not sufficient. 32GB is clocking at full speed and working perfectly making my machine ultra responsive even with 20GB in use by apps, but the new modules didn't play well with OEM - it would not boot up with mixing and matching the 2x4GB and 2x16GB in any order, but still definitely worth it.

I was looking for a RAM upgrade for my Mac mini, this one was perfect, works as expected and you can obviously tell the difference when using the computer. Is not that easy to install because of Apples Mac mini design but it is just a matter to follow any YouTube tutorial to put the part into the computer. I totally recommend it as it works perfectly and you will be saving a lot of money compared to Apple's retail price when buying the computer.

Las memorias perfectas, fueron súper fácil de instalar, al principio no las reconoció pero al instalarlas de a cuerdo al instructivo que viene en la cajita, las reconoció sin problemas y mi máquina ha estado trabajando Perfecto, altamente recomendable

NO ME GUSTO YA QUE LAS ESPECIFICACIONES DE COMO SE ANUNCIA NO SON LAS MISMAS

J'ai un IMac 27 pouces 2020 avec un i7 8 cœurs de 10eme génération et 8Go (2x4Go) de Ram. Le but était de passer à 40Go en ajoutant 32Go (2x16Go). Après l'ajout des barrettes, le mac n'a pas voulu démarrer, elles étaient pourtant bien enclenchées. Par acquis de conscience, j'ai inversé les nouvelles barrettes et les anciennes et plus de souci ! Les 4 barrettes (40Go) sont détectées correctement et ça a l'air de fonctionner. Seulement 4 étoiles parce que je n'ai pas encore poussé la bête donc à voir sur la durée.Produit reçu le lendemain, bien emballé, et qui fonctionne alors à ce prix là, faites vous plaisir !

2020imac27インチで確認。コスパは最高ですが、同梱の説明書通りのスロット設置位置だと速度2666Mhzが出ませんでした。Amazonの製品説明書画像のが正解です。他の情報にもありますが古いメモリから下から純に刺すのが正解のようです。製品自体は設置後10日ほど経ちますが今のところ問題ありません。

The rams work great with Mac Mini 2018/2020. No issue so far. But need to be wary of getting the correct screwdriver for Mac Mini and you will have no issue installing them.The issue I had was that I installed the ram incorrectly causing 1 of them to be not detected and when reassembling Mac mini the Fan in the Mac mini stopped working. So I had to re-do the ram and fan connection. Otherwise all are good.