HP Z640 Workstation 2 x E5-2623v3 32GB RAM 256GB SSD K1200 - VRLA Tech
REVIEW: HP Z640 Workstation - AEC Magazine
32GB Memory for HP Z640 Workstation DDR4 PC4-17000 2133 MHz LRDIMM RAM (PARTS-QUICK Brand) at Amazon.com
Refurbished: HP Z640 Workstation E5-2609 v3 1.9GHz 6-Cores 64GB DDR4 Quadro K600 512GB SSD No Operating System Desktop Computers - Newegg.com
Adamanta Micron Original 128GB (4x32GB) Server Memory Upgrade for HP Z640 Workstation with Single and Dual CPU DDR4 2400MHZ PC4-19200 ECC Registered Chip 2Rx4 CL17 1.2v RAM at Amazon.com
A-Tech 32GB Module for HP Z640 Workstation - DDR4 PC4-21300 2666Mhz ECC Load Reduced LRDIMM 2Rx4 - Server Specific Memory Ram (AT378361SRV-X1L1) at Amazon.com
REVIEW: HP Z640 Workstation - AEC Magazine
parts-quick 8GB Memory for HP Z640 Workstation DDR4 PC4-17000 2133 MHz RDIMM Compatible RAM at Amazon.com