To your ‘free GPU memory on Windows’ question: there’s a lot of talks about it on the DirectX dev list, so try to do a search there and you’ll surely find more comprehensive answer but, as far as I know, the official answer in a nutshell is “there’s no officialy supported way, because there’s no good definition of what that GPU memory is”. People have been complaining about it for ages, but I think Microsoft learned a lesson before and got it right in this one by not providing a solution that only works most of the time. But of course people end up doing quirky queries anyway… As I said, there’s plenty info there.

Regards,
Roman