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The threads are inches. I have tried lots of values. Currently slow enough that you can hear it winding up. Gets it moving but it will stutter to a halt after a couple turns.

DarkPhoinix wrote:

So why do they do these tests with 4 YouTube videos in 4k in the forum? in direct connection with stress test 100 GLXgears I can work safely even with NVIDIA! I got this AMD VGA and now I also bought a motherboard with HDMI output to pass the YouTube 4K video test!

Youtube is used to stress the video subsystem as video uses interrupts that require the PC to halt until whatever is requested by that interrupt is finished, then go on to do other stuff, and so on. I am not aware of anywhere being stated you must use 4 youtube videos, if you are, please let us know so we can fix that. A single window maximizing and minimizing is enough to trigger latency excursions, so 4 are overkill and prove nothing.
Same thing with GlxGears, video, but easier to run, but this also uses OpenGL that is used by LinuxCNC, namely Gremlin uses it to display the stuff being cut. We use 10 as it is very lite on resources, but 100?
You keep mentioning that under stress it works fine (even unresponsive, and this is something Linux does magnificently), so you can try adding a base period and test some values till you get something that gets rid of errors/issues.
Probably something like this should do, add to hal file:You can safely try from 10000 to 500000 (10K to 500K), above would probably not help at all and below might cause the PC to slow down.

It says theres a way to set it from analog to PWM in the manual, but the manual shows that its a software option, so Im not sure how thats supposed to even work...

Maybe it is an actual issue with the analog converter, I found a post from a few years ago about the older hardware

forum.linuxcnc.org/18-computer/44828-rem...ard?start=680#264265

Maybe @rbobey1989 has some insight, hes doing something with firmware and pwm nat the moment