Kingston 32GB ECC Reg DDR4 2666MHz (KTH-PL426/32G) at Amazon.com
Amazon.com: Silicon Power DDR4 32GB (2x16GB) Turbine 3200MHz (PC4 25600) 288-pin CL16 1.35V UDIMM Desktop Memory Module RAM - Low Voltage (SP032GXLZU320BDA) : Health & Household
G.Skill Trident Z RGB Series 32GB (2 x 16GB) 288-Pin SDRAM (PC4-25600) DDR4 3200 CL16-18-18-38 1.35V Dual Channel Desktop Memory Model F4-3200C16D-32GTZR at Amazon.com
Crucial RAM 32GB DDR4 3200MHz CL22 (or 2933MHz or 2666MHz) Laptop Memory CT32G4SFD832A at Amazon.com
32GB (2X16GB) DDR4-2666 PC4-21300 ECC SODIMM Compatible with Synology D4ECSO-2666-16G Memory Upgrade Module by NEMIX RAM at Amazon.com
TEAMGROUP Elite DDR4 32GB Kit (2 x 16GB) 2666MHz PC4-21300 CL19 Unbuffered Non-ECC 1.2V SODIMM 260-Pin Laptop Notebook PC Computer Memory Module Ram Upgrade - TED432G2666C19DC-S01 at Amazon.com
Silicon Power DDR4 32GB 3200MHz (PC4-25600) CL22 SODIMM 260-Pin 1.2V Gaming Laptop Non-ECC RAM Notebook Computer Memory at Amazon.com
Crucial RAM 32GB Kit (2x16GB) DDR4 3200MHz CL22 (or 2933MHz or 2666MHz) Laptop Memory CT2K16G4SFRA32A at Amazon.com
G.Skill Ripjaws SO-DIMM Series 32GB (16GB x 2) 260-Pin SO-DIMM PC4-21300 DDR4 2666 CL19-19-19-43 1.20V Dual Channel Laptop Memory Model F4-2666C19D-32GRS at Amazon.com
Amazon.com: Corsair CMK32GX4M2A2666C16 Vengeance LPX 32GB (2x16GB) DDR4 DRAM 2666MHz (PC4-21300) C16 Memory Kit - Black : Electronics