I have windows 10. Acknex ran normally with high framerates.
Now I did ... something (updated the driver, installed a printer, added some software) and now the framerate can't even reach 60 fps with no level loaded.
I have no clue what happened. I hope somebody encountered such a problem before.
I narrowed it down to the new nvidia driver. But I don't know what it is that's slowing acknex down. I bet it is the vr-ready crap they put in into their driver. For now I will run acknex with the intel intern card Much more frames there.