[Alex Miller]

I hate to resurrect an old thread, but just thought that for anyone looking for solutions to run Windows 10 on a z620 w/ thunderbolt, I have personally had luck.

First one must install all of the HP required thunderbolt drivers and BIOS updates while running a prior version of Windows (I used Windows 7 Pro). Then, do a non-destructive update to Windows 10 (this gives the ability to roll-back to the prior version of Windows to remedy issues). Thunderbolt will work, but you must attach your thunderbolt devices while the computer is off. Ejecting a thunderbolt device while the computer is on will for some reason crash the driver, necessitating a restart. Also, speeds seem limited. For the first few seconds on transfers I get a solid 500MB/s from RAID, which then drops to 30-60MB/s.

All in all unless you already have a z620 that you want to use thunderbolt with I’d say you’re better off purchasing a rig that correctly supports thunderbolt. These workstations are getting old in the tooth.