As far as I know, there are no performance differences. It could be that you switched to a newer GPU core version or a different set of nVidia drivers at the same time as you switched to Win7, and that is what is causing the PPD difference.is it true that one gets more PPD in xp than in win 7?
when i was using xp 2 weeks ago my all frame base ppd for 353pt were 93xx.
and now with win 7 its only 89xx?
I have no idea what you're talking about. But use HFM.NET instead .