I just finished my new build with the help of my son and anxiously waited to try it out on VP11 and was disappointed to find that it got the error message that everyone has been writing about when trying to render to Mainconcept MP4. I'm using a GTX 670 graphics card and was hoping for success...then my son emailed a link to a beta driver for the nvidea cards which i downloaded and guess what....it now renders with GPU (at least the rendertest file) and it was smokin'! I have to rearrange my workspace now and can't wait to try it out on an older project to see if there are any other crashes, but keeping fingers crossed. The address for the beta driver is:
http://www.google.com/gwt/n?u=http%3A%2F%2Fwww.geforce.com%2Fdrivers%2Fresults%2F46279
http://www.google.com/gwt/n?u=http%3A%2F%2Fwww.geforce.com%2Fdrivers%2Fresults%2F46279