Amazon.com: HP Z240 Workstation SFF Desktop PC, Intel Core i5-6500 Upto 3.60GHz, 16GB RAM, 1TB SSD, AMD Radeon HD 8570 1GB 4K, DisplayPort, HDMI, DVI, AC Wi-Fi, Bluetooth - Windows 10 Pro (
A-Tech 64GB Kit (4x16GB) Memory RAM for HP Z240 Workstation - DDR4 2400MHz PC4-19200 ECC Unbuffered UDIMM 2Rx8 1.2V - Server at Amazon.com
Amazon.com: HP Z240 Small Form Factor Worksation PC, Intel Core i5-7500 up to 3.8GHz, 16GB DDR4 RAM, 1TB SSD, Wireless WiFi, Bluetooth, Keyboard, Mouse, Windows 10 Pro 64(Renewed) : Electronics
RAM upgrade for an HP z240 - HP Support Community - 6903727