Hynix 8GB (1 x 8GB) PC4-21300 (DDR4-2666) Memory (HMA81GR7AFR8NVK) for sale online | eBay
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
Samsung M393A2G40EB2-CTD 16GB DDR4 ECC Registered DIMM 288-Pin PC4-21300 2666MHz PC4-2666V 2Rx4 1.2V Server Memory RAM at Amazon.com