Hi Burr,

> I'll fool around a bit more with some of the other driver settings later. Any suggestions on
> those other than the thread optimization off?

Nope, I'd leave everything else other than "threaded optimization" to be at the defaults. Also make sure not to force anti-aliasing on with the driver settings or else it can mess up how selection works in MoI.

But also now that I see what your test file is like, a "sphere grid" is actually a particular kind of case since each sphere only has a single edge in it. So your test file happens to be heavy on surface drawing and light on edge drawing, and it's actually edge drawing that consumes the most CPU and also therefore has the most to benefit from the multi-core use as well.

On a more real model you would tend to have more than just one edge for each surface, especially with areas that have been cut and booleaned.

- Michael