RMSA3300ME78HBF-2666 16gb Pc4 2666MHz DDR4 So-Dimm Non-ECC 260 pin 1.2V Ram Memory for Laptop and All in One Desktop Computer (16gb Pc4 2666MHz DDR4 So-Dimm) at Amazon.com
Patriot Viper Elite Series DDR4 16GB (2x8GB) 2666MHz PC4-21300 Dual Memory Kit (Black/Grey) PVE416G266C6KGY at Amazon.com
Amazon.com: Corsair Vengeance LPX 16GB (2x8GB) DDR4 DRAM 2666MHz (PC4-21300) C16 Memory Kit - Black : Everything Else
Timetec 32GB KIT(2x16GB) Compatible for Apple DDR4 2666MHz / 2667MHz for Mid 2020 iMac (20,1/20,2) / Mid 2019 iMac (19,1) 27-inch w/Retina 5K, Late 2018 Mac Mini (8,1) PC4-21333 /PC4-21300 MAC RAM at Amazon.com
Axiom 16GB DDR4-2666 ECC RDIMM for HP - 815098-B21 at Amazon.com
Astra-Gear 8GB(1x8GB) 2666MHz DDR4 Unbuffered Non-ECC U-DIMM Upgrade for Desktop Memory Ram 1.2V CL19 260-Pin(AHD19S8G26S) at Amazon.com