A-Tech 128GB Kit (2 x 64GB) for Dell PowerEdge R740 - DDR4 PC4-21300 2666Mhz ECC Load Reduced LRDIMM 4Rx4 - Server Specific Memory Ram (AT316645SRV-X2L2) at Amazon.com
Amazon.com: A-Tech 16GB Memory RAM for Dell PowerEdge R740 - DDR4 2933MHz PC4-23400 ECC Registered RDIMM 2Rx8 1.2V - Single Server Upgrade Module (Replacement for AA579532) : Electronics
Amazon.com: WORKDONE 3.5 inch Hard Drive Caddy - Compatible for Dell PowerEdge Servers - 14th Gen R440 R540 R640 R740 R740xd2 R6415 R7425 More - Bright LED Hot Swap SAS SATA Bracket
2.5" SAS SATA Hard Drive Tray Caddy for DELL GEN 14 POWEREDGE SERVER R640 R740 R740xd R940 SFF DXD9H