TEAMGROUP Elite DDR4 16GB Kit (2 x 8GB) 2666MHz PC4-21300 CL19 Unbuffered Non-ECC 1.2V SODIMM 260-Pin Laptop Notebook PC Computer Memory Module Ram Upgrade - TED416G2666C19DC-S01 at Amazon.com
Patriot Signature Line DDR4 16GB (2 x 8GB) 2666MHz (PC4-21300) UDIMM Dual Kit Memory Kit PSD416G2666K at Amazon.com
Amazon.com: OWC 8GB (2 x 4GB) PC19200 DDR4 2400MHz SO-DIMMs Memory Compatible with Mac Mini (Late 2018), 27" and 21.5" iMac (Mid 2017), and Compatible PCs (OWC2400DDR4S08P) : Everything Else
G.Skill Trident Z Royal Series [Silver] 16GB (2 x 8GB) 288-Pin SDRAM (PC4-25600) DDR4 3200 CL16-18-18-38 1.35V Dual Channel Desktop Memory Model F4-3200C16D-16GTRS at Amazon.com
Timetec 16GB KIT(2x8GB) DDR4 2400MHz PC4-19200 Non-ECC Unbuffered 1.2V CL17 1Rx8 Single Rank 260 Pin SODIMM Laptop Notebook PC Computer Memory RAM Module Upgrade (16GB KIT(2x8GB)) at Amazon.com
Crucial RAM 8GB DDR4 3200MHz CL22 (or 2933MHz or 2666MHz) Laptop Memory CT8G4SFRA32A at Amazon.com