Laggy geometry window

[KrisBee]

So ever since wings version numbers went past 1.5.4, the geometry window has been extremely laggy whenever I work on models with generous poly counts (500000+). I'm guessing this is due to the changed anti-aliasing.

While it is very nice for checking out how the model looks all smoothed out, but for actual work it's a deal breaker. Problem is I can't seem to turn it off for a performance boost; Disabling multi sampling and anti-aliased edges in preferences does nothing to help.

Nvidia control panel settings don't seem to have any kind of effect either on the wings geo window. (Am I missing something here?) Right now I have to stick with 1.5.4 because of said performance problems. That's not a long term solution however. I'd really like to use the latest available version and keep up with all the latest features but I just can't use it for modeling anything big as it is right now.

So can anyone offer any tips?