Hi Burr,

> Nvidia quadro card. Just tried to turn off thread optimization witgh no change in result.

Hmmm, well that's disappointing!

Can you test what happens if you set DisplayThreadLimit=1 in MoI.ini (in the [View] section), does it then only show one actual core active when rotating the view or is the driver still using some itself then?

You also might try setting DisplayThreadLimit=6 or so and see if that produces some better results. It's possible with too many threads to actually have things degrade somewhat in areas where they need to be coordinated.

- Michael