install/52782: Install failed on Threadripper 1950x on x399 taichi 2x16GB DDR4 2133

[lyuben%oshte.net@localhost]

>Number:         52782
>Category:       install
>Synopsis:       Install failed on Threadripper 1950x on x399 taichi 2x16GB DDR4 2133
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    install-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Dec 03 19:45:00 +0000 2017
>Originator:     Lyuben Milev
>Release:        NetBSD-7.1-amd64-install.img
>Organization:
Oshte NET LTD
>Environment:
>Description:
- Installing from USB (dd)
- Installing normal at <root device>: [blinking cursor here]
- Installing NO ACPI failed at <root device>: [blinking cursor here]
- Installing NO ACPI, NO SMP failed at <root device>: [blinking cursor here]
>How-To-Repeat:

>Fix: