HP Z400 Workstation - Memory | HP® Customer Support
HP Z400 Workstation Configure To Order
CMS 8GB (2X4GB) DDR3 10600 1333MHZ ECC Non Registered DIMM Memory Ram Compatible with HP/Compaq Workstation Z400 Workstation for Server Only - B80 at Amazon.com
Gaming on a Cheap Xeon: The HP Z400 Workstation - Boiling Steam
HP Z400 Xeon X5670 Gaming PC 24Gb 500Gb SSD 256Gb NVME Radeon RX 470 [*i7-4770] | eBay