HP Z440 Series Turnkey Workstation with 16GB RAM B&H Photo Video
HP Z440 Workstation Memory/Ram Install (4 x 8GB = 32GB DDR4) - YouTube
HP Z440 Mini Tower Workstation Xeon E5-1620 v3 3.50GHz CPU 8GB DDR4 RAM *No HDD | eBay
RAM Update in Workstatino Z440 do not work - HP Support Community - 6881802
Adamanta 128GB (8x16GB) Server Memory Upgrade Compatible for HP Z440 Workstation DDR4 2133MHz PC4-17000 ECC Registered Chip 2Rx4 CL15 1.2v DRAM RAM at Amazon.com