{"product_id":"owc-64gb-4-x-16gb-ddr4-2666mhz-so-dimms-memory-mac-pc-upgrade","title":"OWC 64GB (4 x 16GB) DDR4 2666MHz SO-DIMMs Memory - Mac \u0026 PC Upgrade","description":"\u003cp\u003eIn this review the OWC 64GB (4 x 16GB) DDR4 PC21300 SO-DIMMs kit is judged as a straightforward, warranty-safe memory upgrade for users who need a large RAM boost. It is aimed at owners of compatible 2018 Mac mini, 2019 and 2020 27' iMac models, and a wide range of PC laptops and desktops; the single biggest reason to buy is the jump from typical stock capacities to a full 64GB using four matched 16GB modules backed by OWC's lifetime limited warranty and advanced replacement program.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e Four 16GB modules deliver a total of 64GB for heavy multitasking and memory-hungry applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm factor:\u003c\/strong\u003e 260-pin SO-DIMM design fits compatible Mac desktops and many PC laptops and small-form-factor machines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeed and voltage:\u003c\/strong\u003e DDR4 PC4-21300 at 2666MHz and 1.2 volts offers a reliable balance of performance and efficiency for supported systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Specifically compatible with iMac 2019 and 2020 Retina 5K 27' models and Mac mini 2018, plus many Dell, HP, ASUS and other PC systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards compliance:\u003c\/strong\u003e Non-ECC, non-registered, JEDEC and ROHS compliant modules provide a warranty-safe upgrade path.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupport and warranty:\u003c\/strong\u003e Lifetime limited warranty and OWC Advanced Replacement Program mean free tech support and easy replacement if issues arise.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe kit is best for creative professionals, developers, and power users who run large projects, virtual machines, or professional editing software on supported iMac 27' or Mac mini systems and need consistent, OEM-quality memory. Gamers and PC users with laptops or desktops that accept 260-pin SO-DIMMs will also find the 64GB useful where motherboard and BIOS support that capacity.\u003c\/p\u003e\n\u003cp\u003eUsers with systems that do not support 2666MHz SODIMMs, those who only need a modest upgrade from 8GB to 16GB, or buyers seeking RGB or gaming-branded DIMMs should look elsewhere; this kit focuses on compatibility, reliability, and warranty-backed replacement rather than cosmetic features.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLarge 64GB total capacity in a matched four-module kit supports heavy multitasking and professional workflows.\u003c\/li\u003e\n\u003cli\u003eBroad compatibility listing for specific iMac models and many PC brands reduces guesswork during purchase.\u003c\/li\u003e\n\u003cli\u003eJEDEC compliant, low-voltage 1.2V design helps with stability and power efficiency.\u003c\/li\u003e\n\u003cli\u003eLifetime limited warranty and advanced replacement program provide peace of mind and free tech support.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRequires systems that accept four SODIMM slots or equivalent configuration; not suitable for machines limited to two slots or different form factors.\u003c\/li\u003e\n\u003cli\u003eSpeed limited to 2666MHz; higher-frequency memory options exist for systems that support them.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapacity\u003c\/td\u003e\n\u003ctd\u003e64GB (4 x 16GB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory Type\u003c\/td\u003e\n\u003ctd\u003eDDR4 PC4-21300 SO-DIMM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeed\u003c\/td\u003e\n\u003ctd\u003e2666MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePins\u003c\/td\u003e\n\u003ctd\u003e260-pin SO-DIMM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e1.2V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eECC \/ Registered\u003c\/td\u003e\n\u003ctd\u003eNon-ECC, Non-registered\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eOWC Lifetime Limited Warranty with Advanced Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe OWC 64GB (4 x 16GB) DDR4 2666MHz SO-DIMM kit is a practical, warranty-backed upgrade for compatible iMac and Mac mini owners and many PC systems that need substantial memory headroom. It is a good value for professionals who require reliable, OEM-level memory and prefer a vendor-backed replacement program over unbranded options.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this kit work in my 27' iMac?\u003c\/strong\u003e\u003cbr\u003eCheck your model ID: compatible listings include iMac19,1 and iMac20,1\/20,2 for the specified 27' Retina 5K models; if your model matches, it is supported.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this memory covered if a module fails?\u003c\/strong\u003e\u003cbr\u003eYes. OWC provides a Lifetime Limited Warranty and an Advanced Replacement Program that covers defective modules and includes free tech support.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I mix these modules with existing RAM?\u003c\/strong\u003e\u003cbr\u003eFor best results use matched modules from the kit; mixing with other brands or sizes can work but may reduce stability or prevent full capacity recognition.\u003c\/p\u003e","brand":"OWC","offers":[{"title":"Default Title","offer_id":48752372023515,"sku":"B07QD2CQS7","price":178.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61uFz7W-tuL._AC_SL1500.jpg?v=1778782003","url":"https:\/\/gearmusthave.com\/products\/owc-64gb-4-x-16gb-ddr4-2666mhz-so-dimms-memory-mac-pc-upgrade","provider":"GearMustHave","version":"1.0","type":"link"}