Best 2666ddr4s64s Deals of Nov 2026

Updated November 10, 2026Our site contains affiliate links for which we may be compensated.
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OWC

OWC Memory 64GB (4X 16GB) DDR4 PC4-21300 2666MHz RAM | 288-Pin Compatible with Mac mini 2018, iMac 2019 and up, and Compatible PCs

OWC 256.0GB UPGRADE: Consists of Four 16GB DDR4 PC4-21300 SODIMM 260-Pin, 1.2 Volts, Non-registered, Non-ECC, Fully compliant with JEDEC specifications, ROHS compliant, warranty safe upgrade; Backed by OWC Memory Lifetime Limited Warranty including the OWC Lifetime Advanced Replacement Program
COMPATIBLE WITH: 2020 iMac: iMac w/Retina 5K display (27 inch mid 2020) Model ID: iMac20,1 and iMac20,2 (3.1GHz i5, 3.3GHz i5, 3.8GHz i7, 3.6GHz i9)
COMPATIBLE WITH: 2019 iMac: iMac w/Retina 5K display (27-inch Early 2019) Model ID: iMac19,1 (3.0GHz i5, 3.1GHz i5, 3.7GHz i5, 3.6GHz i9) Models: MRQY2LL/A, MRR02LL/A, MRR12LL/A
COMPATIBLE WITH: PC gaming laptops and PC desktops: Dell, HP , Toshiba, ASUS, Acer, Supermicro, Fujitsu, Gigabyte, Intel, Lenovo, LG, Samsung, Sony, Supermicro
COMPATIBLE PART NUMBERS: CT16G4S266M, CT2K16G4S266M, KCP426SD8/16, KCP426SS8/16, M471A2K43BB1‐CTD, M471A2K43CB1‐CTD, M471A2K43DB1‐CTD, M474A2K43DB1‐CTD, CT16G4SFS8266, HMA82GS6CJR8N‐VK
INDUSTRY LEADING: Consumer Friendly Advanced Replacement Program and Limited Lifetime Warranty, which Includes Free Tech Support by Other World Computing
Details & specs
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on Amazon.com
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A-Tech DDR4 RAM 8GB 2666MHz PC4-21300 SODIMM Laptop Memory | Non-ECC PC4-2666V CL19 260-Pin SO-DIMM 1.2V Notebook Computer Memory Upgrade Module

A-Tech 8GB RAM Module, DDR4 SO-DIMM 260-Pin, 2666MHz / 2667MHz PC4-21300 (PC4-2666V)
Non-ECC Unbuffered, JEDEC DDR4 Standard 1.2V Operating Voltage
Compatible with select DDR4 SODIMM capable Laptop, Notebook, Mini PC, and All-in-One (AIO) computer systems. Please verify your system's memory type, form factor, and maximum supported capacity before purchasing
Not compatible with desktop (DIMM), DDR2, DDR3, DDR5, ECC Registered (RDIMM), ECC Load Reduced (LRDIMM), or ECC Unbuffered (ECC UDIMM) memory types
Increases available memory capacity to enhance system responsiveness, application performance, and multitasking capabilities.
Easy plug-and-play installation with no technical expertise required; built with high quality DRAM components and rigorously tested for reliability and long term stability.
Backed by A-Tech's Limited Lifetime Warranty and supported by our dedicated Technical Support team before and after your purchase
Check Price
on Amazon.com
Our #1 Pick Today
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OWC

OWC Memory 64GB (4X 16GB) DDR4 PC4-21300 2666MHz RAM | 288-Pin Compatible with Mac mini 2018, iMac 2019 and up, and Compatible PCs

OWC 256.0GB UPGRADE: Consists of Four 16GB DDR4 PC4-21300 SODIMM 260-Pin, 1.2 Volts, Non-registered, Non-ECC, Fully compliant with JEDEC specifications, ROHS compliant, warranty safe upgrade; Backed by OWC Memory Lifetime Limited Warranty including the OWC Lifetime Advanced Replacement Program
COMPATIBLE WITH: 2020 iMac: iMac w/Retina 5K display (27 inch mid 2020) Model ID: iMac20,1 and iMac20,2 (3.1GHz i5, 3.3GHz i5, 3.8GHz i7, 3.6GHz i9)
COMPATIBLE WITH: 2019 iMac: iMac w/Retina 5K display (27-inch Early 2019) Model ID: iMac19,1 (3.0GHz i5, 3.1GHz i5, 3.7GHz i5, 3.6GHz i9) Models: MRQY2LL/A, MRR02LL/A, MRR12LL/A
COMPATIBLE WITH: PC gaming laptops and PC desktops: Dell, HP , Toshiba, ASUS, Acer, Supermicro, Fujitsu, Gigabyte, Intel, Lenovo, LG, Samsung, Sony, Supermicro
COMPATIBLE PART NUMBERS: CT16G4S266M, CT2K16G4S266M, KCP426SD8/16, KCP426SS8/16, M471A2K43BB1‐CTD, M471A2K43CB1‐CTD, M471A2K43DB1‐CTD, M474A2K43DB1‐CTD, CT16G4SFS8266, HMA82GS6CJR8N‐VK
INDUSTRY LEADING: Consumer Friendly Advanced Replacement Program and Limited Lifetime Warranty, which Includes Free Tech Support by Other World Computing
Details & specs
Check Price
on Amazon.com
Disclaimer: While we make every effort to ensure accuracy, we cannot guarantee that all product specifications, pricing, discounts, and details are complete or error-free. Because information is subject to change, we recommend verifying all details directly with the retailer prior to making a purchase. As an Amazon Associate, we earn from qualifying purchases.

9 2666ddr4s64s deals are available from: Amazon, starting from $54.99.

The biggest discount we found is 10% on PNY DDR4 64GB (2x32GB) 3200MHz CL22 Performance Notebook Memory Kit | PC4-25600, CL22, 1.2V, Notebook/Laptop RAM, Compatible: 2933/2666/2400/2133MHz - MN64GK2D43200-TB (MN64GK2D43200-TB) at Amazon.

The lowest price we found is $54.99 while the highest is $497.97. Prices for the best 2666ddr4s64s deals average at $259.70.