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A-Tech 4GB for HP HP Z400 Workstation (6 DIMM Slots) (1 x 4GB) PC3-12800 (DDR3-1600) ECC Unbuffered UDIMM 240-Pin 1Rx8 1.35V Server Memory RAM at Amazon.com
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A2Z50AA 8GB PC3-12800 DDR3 1600MHz ECC UDIMM RAM Memory HP Z400 Z420 Z620 Z820 (3rd Party) - Walmart.com
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4GB 2X2GB RAM Memory for Compaq HP Z Series Workstations Z200 Workstation, Z210 CMT Workstation (Xeon E3, Core i3 and Intel Pentium processors), Z400 Workstation (4 DIMM Slots), Z400 Workstation (6 - Walmart.com
![HP Z400 internals, X5670, 12gb RAM GTX1060 3gb - computer parts - by owner - electronics sale - craigslist HP Z400 internals, X5670, 12gb RAM GTX1060 3gb - computer parts - by owner - electronics sale - craigslist](https://images.craigslist.org/00T0T_8btqKlekoG8_0hz0t2_600x450.jpg)
HP Z400 internals, X5670, 12gb RAM GTX1060 3gb - computer parts - by owner - electronics sale - craigslist
Infomac Sales & Service - CPU HP Z400 Workstation (Second hand) - SOLD Price : RM700 Windows 7 Professional 64 bit Intel Xeon CPU W3550 @3.07Ghz RAM 8 GB Hard Disk 500
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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 Gaming Computer PC GeForce GTX 1060 256GB SSD 12GB RAM [Z400] - $825.00 : Professional Multi Monitor Workstations, Graphics Card Experts HP Z400 Gaming Computer PC GeForce GTX 1060 256GB SSD 12GB RAM [Z400] - $825.00 : Professional Multi Monitor Workstations, Graphics Card Experts](https://www.compeve.com/images/Z400_compeve_nw__17.jpg)
HP Z400 Gaming Computer PC GeForce GTX 1060 256GB SSD 12GB RAM [Z400] - $825.00 : Professional Multi Monitor Workstations, Graphics Card Experts
![Managed to get an old HP Z400 workstation for the equivalent of $75 USD. Xeon W3520, 6x2gb of ram and I replaced the Quadro FX580 with a GT 730 I had laying Managed to get an old HP Z400 workstation for the equivalent of $75 USD. Xeon W3520, 6x2gb of ram and I replaced the Quadro FX580 with a GT 730 I had laying](https://i.redd.it/i0bmrl7xjvn81.jpg)