4GB RAM Memory for HP Workstation Z400 240pin PC3-8500 DDR3 UDIMM 1066MHz Black Diamond Memory Module Upgrade - Walmart.com
This is my HP Z400, upgraded with a Xeon X5690. 12gb of ram, 2x500gb SSD, 2x250gb HDD, GTX 960 (the gpu is totally overkill lol). This is my first server! Running pterodactyl
CMS 8GB (2X4GB) DDR3 10600 1333MHZ ECC Non Registered DIMM Memory Ram Upgrade Compatible with HP/Compaq® Workstation Z400 Workstation for Server Only - B80 at Amazon.com
HP Z400 12GB 3.2GHz Computers - Windows 10 | Like New, Low Price!