Z400 cooling strategy 'revealed' - HP Support Community - 5933018
Acquired Z400 & xw8400 - which 1 to upgrade + issues - HP Support Community - 7346518
HP Z400 Gaming Computer (GTX 1080 Ti and NVMe.2 Install) - YouTube
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 around. I will add an SSD. : r/pcmasterrace
HP Z600 + Nvidia 3070 Can I use It? - HP Support Community - 7759403