XPG Spectrix D41 DDR4 RGB 2666MHz 16GB (2x8GB) 288-Pin PC4-21300 Desktop U-DIMM Memory Retail Kit Red (AX4U266638G16-DR41) at Amazon.com
Amazon.com: Corsair Vengeance LPX 16GB (2x8GB) DDR4 DRAM 2666MHz (PC4-21300) C16 Memory Kit - Black : Everything Else
Amazon.com: Corsair Vengeance LPX 16GB (2x8GB) DDR4 DRAM 2666MHz (PC4-21300) C16 Memory Kit - Black : Everything Else
A-Tech 32GB Module for HP Z840 Workstation - DDR4 PC4-21300 2666Mhz ECC Load Reduced LRDIMM 2Rx4 - Server Specific Memory Ram (AT378286SRV-X1L1) at Amazon.com