Install failing: LinuxCNC 2.8.0 Debian 10 Buster PREEMPT-RT ISO

Still usable latency for software stepping (parallel port) and very usable for Mesa boards as they do not use a Base period.
Try to find another graphic card and test latency again if you plan on using parallel port, Nvidia cards tend to mess up latency.

Berto wrote: Seems quite a jump in the latency test though? I wonder if it would be worth trying the Linuxmint route?

The difference is probably between RTAI and preempt-rt rarther than between Wheezy and Buster.

It is possible to run Buster and RTAI: linuxcnc.org/docs/2.8/html/getting-start...#cha:Installing-RTAI