parts-quick 16GB Memory for HP Workstation Z240 Tower/SFF Xeon Processor DDR4 2400MHz ECC UDIMM RAM at Amazon.com
Timetec 4GB DDR4 2400MHz PC4-19200 Non-ECC Unbuffered 1.2V CL17 1Rx8 Single Rank 260 Pin SODIMM Laptop Notebook PC Computer Memory RAM Module Upgrade (4GB) at Amazon.com
A-Tech 16GB (2x8GB) RAM for Apple iMac 2017 (27 inch Retina 5K & 21.5 inch Retina 4K) | DDR4 2400MHz SODIMM PC4-19200 1.2V 260-Pin SO-DIMM Memory Upgrade Kit at Amazon.com
Amazon.com: OWC 32GB (2 x 16GB) PC19200 DDR4 2400MHz SO-DIMMs Memory Compatible with Mac Mini (Late 2018), 27" and 21.5" iMac (Mid 2017), and Compatible PCs (OWC2400DDR4S32P) : Everything Else
Timetec 8GB DDR4 2400MHz PC4-19200 Non-ECC Unbuffered 1.2V CL17 1Rx8 Single Rank 288 Pin UDIMM Desktop PC Computer Memory RAM Module Upgrade (8GB) at Amazon.com
OLOy DDR4 RAM 8GB (1x8GB) 2400 MHz CL17 1.2V 260-Pin Laptop Gaming SODIMM for Intel (MD4S082417IZSC) at Amazon.com