OWC 8.0GB UPGRADE: Consists of an 8GB 2666MHz 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) Models: MXWT2LL/A, MXWU2LL/A, MXWV2LL/A 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: 2018 Mac mini: Mac mini (Late 2018) (November, 2018) Model ID: Macmini8,1 (3.6GHz i3, 3.0GHz i5, 3.2GHz i7) Models: MRTR2LL/A, MRTT2LL/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: CT8G4S266M, CT2K8G4S266M, KCP426SD8/8, KCP426SS8/8, HMA81GS6AFR8N‐VK, HMA81GS6DJR8N‐VK, HMA81GS6JJR8N‐VK, M471A1K43BB1‐CTD, M471A1K43CB1‐CTD INDUSTRY LEADING: Consumer Friendly Advanced Replacement Program and Limited Lifetime Warranty, which Includes Free Tech Support by Other World Computing