Price: $155.96
(as of Sep 14, 2025 11:27:43 UTC – Details)
Product description
COMPATIBLE WITH THE FOLLOWING MODELS 
2019 iMAC 5K 19,1
iMac Core i5 3.0 and 3.1 27″ (5K, 2019)iMac Core i5 3.7 27″ (5K, 2019)iMac Core i9 3.6 27″ (5K, 2019) 2020 iMAC 5K 19,1
iMac Core i5 3.1 and 3.3 27″ (5K, 2020)iMac Core i7 3.8 27″ (5K, 2020)iMac Core i9 3.6 27″ (5K, 2020)
OWC DDR4 PC4-21300 2666MHZ MEMORY FOR THE 2019-2020 5K iMAC
Technology DDR4 Speed PC4-21300 2666MHz Form Factor 260PIN SO-DIMM ECC Type NON ECC Voltage 1.2v CL Rating 19 Avail Size 4GB, 8GB, 16GB, 32GB, 64GB, 128GB Compatible With iMac 2019-2020 5K Backward Compatible WILL WORK WITH PC4-19200 2400MHz
Other iMac DDR4 Upgrades Available from OWC
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Customer Reviews
4.6 out of 5 stars 4,006
4.6 out of 5 stars 4,006
4.6 out of 5 stars 4,006
4.6 out of 5 stars 4,006
4.6 out of 5 stars 4,006
Price
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$155.96$155.96
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Capacity
128GB (4X32GB)
64GB (2X32GB)
64GB (4X16GB)
32GB (2X16GB)
16GB (2X8GB)
Speed
PC4-21300 2666MHz
PC4-21300 2666MHz
PC4-21300 2666MHz
PC4-21300 2666MHz
PC4-21300 2666MHz
Cas Latency
19
19
19
19
19
Voltage
1.2
1.2
1.2
1.2
1.2V
Form Factor
260PIN
260PIN
260PIN
260PIN
260PIN
Format
SO DIMM
SO DIMM
SO DIMM
SO DIMM
SO DIMM
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
