Adamanta16GB (1x16GB) Memory Upgrade Compatible for 2017 Apple iMac 27" Retina 5K Display & iMac 21.5” Retina 4k Display DDR4 2400MHz PC4-19200 SODIMM 2Rx8 CL17 1.2v Dual Rank RAM DRAM

The Adamanta 64GB (4x16GB) DDR4 RAM kit is an excellent choice for users looking to boost their computer’s performance and multitasking capabilities. Here’s a detailed review:PerformanceThe Adamanta 64GB DDR4 RAM kit excels in performance, delivering fast and reliable memory speeds that significantly enhance your system’s overall responsiveness. With a clock speed of 2666 MHz, it handles demanding applications and multitasking with ease. This makes it ideal for users who run resource-intensive software such as video editing tools, virtual machines, or complex simulations.CapacityWith a total capacity of 64GB distributed across four 16GB modules, this RAM kit provides ample memory for modern computing needs. This is particularly beneficial for professionals and enthusiasts who require substantial memory for tasks like 3D rendering, data analysis, and gaming. The large capacity ensures smooth operation and future-proofs your system for upcoming software and updates.CompatibilityThe Adamanta 64GB DDR4 RAM kit is designed to be compatible with a wide range of systems. It supports most motherboards that accept DDR4 RAM, ensuring broad compatibility across different brands and models. The modules are also compatible with both Intel and AMD platforms, making them a versatile choice for various builds.Ease of InstallationInstalling the Adamanta RAM kit is straightforward, even for users with minimal technical experience. The modules fit securely into the DIMM slots, and the clear instructions provided ensure a hassle-free installation process. Once installed, the system typically recognizes the new memory without requiring additional configuration, making the upgrade process smooth and quick.Build QualityThe build quality of the Adamanta RAM modules is impressive. They feature robust construction and high-quality components that ensure durability and long-term reliability. The modules are designed to operate efficiently under high loads, which is crucial for maintaining system stability​⬤

EDIT: I just benchmarked the differences between my original 8GB VS New 32GB VS 40GB Combined. Running the iMac on just the new 32GB Adamanta RAM got the best results. (Photo of results provided) I did test on Geekbench and Novabench and the results were the same. 7-8% overall performance improvement compared to having the 40GB and even better than having the original 8GB. Where I noticed the most difference was in the responsiveness of the programs, cpu performance and also in the read and write speeds on the Fusion Drive. Huge memory performance boost by using the full utilization of the dual channel memory as opposed to dual channel asymmetric (which is technically single channel apparently) when you mix the modules. The best scenario would be to go for the full 64GB of this memory. I'm very pleased with 32GB however and not at all sweating missing out on the extra 8GB. I'll just sell them.Original Post:I had a similar problem as others with the iMac not starting up after installing the new ram in the empty slots. I first inserted this memory kit into the two empty slots on a new 2017 iMac i5 3.8ghz. The iMac wouldn't power on. I tried switching out the new modules in place of the original ones and putting the original memory into the empty slots. It wouldn't turn on. I then read someone else's post about putting the new modules in the TOP TWO slots (slots 1 and 2) and the old ones on the lower two slots (slots 3 & 4). IT WORKED and it does register as 40GB of ram. I haven't tested to see if there's an effect on performance. I read on Apple's website that you can have mixed ram and it maintains it's dual channel properties. Also, you want the largest RAM modules in the first bank (slots 1 and 2, the top two slots). Also your "iMac performs a memory initialization procedure when you first turn it on after upgrading memory or rearranging DIMMs. This process can take 30 seconds or more, and the display of your iMac remains dark until it's finished. Make sure to let the memory initialization complete." I called Adamanta to confirm the proper arrangement of these memory modules and they confirmed to place the new ram in the first/top two slots.

The listing said this would work in my 2017 iMac, and it did. Took less than 5 minutes to install, and now my Mac is no longer running low on memory with literally dozens of very complex windows open. I gave Tech Support a high rating because they anticipated the information I would need, and pointed me to the right place to show how to upgrade the memory on my Mac. I did not need to call or write to them, so I have no idea how they would respond. I would buy this product again, in a heartbeat!

this memory installed easy and worked great!!!! 5 stars

The memory works perfectly as intended but make sure to remove the existing memory in the computer to avoid some subtle "bugs" like some random disappearance of some icons I noticed in Safari. Easy upgrade and now my old iMac works better than new.

We purchased a 2017 Apple iMac, 27" Retina 5K display and wanted to immediately upgrade our RAM. After much research we decided on the Admanta (2X16GB) RAM cards. They were easy to install, using the included instructions and also confirming from available Apple tech docs. The upgrade took me about 10 minutes and our iMac booted up correctly the first time. Not one issue experienced after 6 months of use. A Quality product that performs as advertised and at a good price. I would buy and use this product again.

No current problems with ram. Easy install, cus it’s basic ram. Fast delivery. Will update if problems occur.

Sin ningún problema después de tres años de estarlo utilizando.

iMac Retina 5K、27インチ、2017年、Big Sur OSの後にクラッシュし、オリジナルのDIMMを取り出して、スロットにこれを入れて、全く問題なし。問題は解決したようです。 少し驚きましたが、嬉しいです。