Adamanta 64GB (2x32GB) メモリー アップグレード対応 2019 Apple iMac 27インチ Retina 5K ディスプレイ付き 2018 年後期 Apple Mac Mini DDR4 2666Mhz PC4-21300 SODIMM 2Rx8 CL19 1.2v DRAM RAM

This article covers Adamanta 64GB (2x32GB) メモリー アップグレード対応 2019 Apple iMac 27インチ Retina 5K ディスプレイ付き 2018 年後期 Apple Mac Mini DDR4 2666Mhz PC4-21300 SODIMM 2Rx8 CL19 1.2v DRAM RAM.

Overview

The Adamanta 64GB (2x32GB) DDR4 2666MHz SODIMM kit is a memory upgrade solution specifically designed for the 2019 27-inch iMac (Retina 5K display) and the 2018 late-model Mac Mini. It runs at DDR4-2666 with CL19 timings at 1.2V, using a dual-rank 260-pin SODIMM form factor. What makes this kit stand out is the ability to reach 64GB of RAM — a capacity that Apple charges a significant premium for — at a much more accessible price point. For users who regularly work with memory-intensive tasks such as 4K video editing, large photo libraries, or running multiple virtual machines, this upgrade can dramatically improve workflow fluidity. While Adamanta is not as widely recognized as Crucial or Kingston in the Mac upgrade space, the brand has built a reputation specifically around Apple-compatible memory. Each module is factory-tested, and the product is backed by a limited lifetime warranty, which adds a layer of confidence for buyers.

Compatibility Guide

This memory kit is compatible with two specific Mac models: the 2019 27-inch iMac (Retina 5K display, model identifier iMac19,1) and the 2018 Mac Mini (model identifier Macmini8,1). The corresponding model numbers are MRQY2LL/A, MRR02LL/A, and MRR12LL/A for the iMac, and MRTR2LL/A and MRTT2LL/A for the Mac Mini. Both machines use DDR4 SODIMM slots. The iMac officially supports up to 64GB, making this a drop-in upgrade. The Mac Mini, however, is officially capped at 32GB — while many users have reported successful 64GB operation, it falls outside Apple's stated specifications, so proceed with that understanding. The modules are DDR4-2666 (PC4-21300), 260-pin SODIMM, dual-rank, non-ECC, unbuffered, CL19, 1.2V. Mixing with existing modules is technically possible but not recommended for optimal stability; matching all slots with identical spec modules is the safer route.

Product Info

The Adamanta 64GB (2x32GB) DDR4 2666MHz SODIMM kit is primarily sold through and other online retailers. It occupies a mid-range market position — more affordable than Apple's BTO upgrade pricing, yet built with reliability-focused testing and support. A limited lifetime warranty is included, along with free technical support from the manufacturer's experienced staff. Every module undergoes full factory testing before shipment, reducing the chance of DOA or early failure. Pricing fluctuates but generally undercuts major competitors like Crucial and Kingston for the same 64GB capacity, making it a strong value pick for budget-conscious Mac users who need maximum RAM without the Apple tax.

Best Use Cases

Creative professionals — If you edit 4K or 6K video in Final Cut Pro, work with large Photoshop/Illustrator files, or process high-resolution RAW photo libraries, 64GB eliminates swap-induced stuttering. The iMac's internal SSD is fast, but nothing beats having the data in RAM. Software developers and IT professionals — Running multiple Docker containers, local Kubernetes clusters, or several virtual machines simultaneously can quickly exhaust 16GB or even 32GB. With 64GB, you can keep your IDE, databases, browsers, and VMs all open without hitting the swap file. Not for light users — If your workflow is limited to email, web browsing, and office documents, 64GB is massive overkill. A 16GB or 32GB kit would serve you just as well and save money. Similarly, Mac gamers will see no real benefit from this capacity.

Things to Consider

The most important caveat is the Mac Mini (2018) official 32GB limit. While community reports confirm 64GB works, Apple will not support or troubleshoot issues arising from exceeding the stated maximum. If you rely on AppleCare or official support, this is a real consideration. As a third-party memory module, there is always a small risk that a future macOS update could introduce compatibility quirks. Major OS upgrades are generally safe, but it's wise to check forums or the seller's page for any reported issues before updating. Compared to Crucial or Kingston, Adamanta has a smaller brand presence and less extensive track record. If long-term warranty support and brand reputation are top priorities, you may prefer a more established name — though you will likely pay more for the same specs. ## FAQ
Q: Will this work in a 2020 or later iMac? A: No. This kit is specifically designed for the 2019 27-inch iMac (iMac19,1). Later iMac models use different memory standards or have soldered RAM, so always check your model identifier before purchasing. Q: Can I mix this kit with the original Apple RAM? A: Technically yes, but it is not recommended. Mixing different capacities, ranks, or timings can force single-channel operation or cause instability. For best results, fill all slots with identical modules from this kit. Q: What does the limited lifetime warranty actually

Product Disclosure (Amazon)

• Manufacturer: Adamanta
• Seller: うさうさ07
• Fulfilled by: うさうさ07
• ASIN: B07YZNM47F
• Note: This article covers a manufacturer-made product based on Amazon listing details.