No, Win7 is not out retail just in public beta (free download). Lots of ppl are trying it that's why I asked. I'm on it and the ambient occlusion thing in the nVidia driver made a night and day difference on my framerates.

My system is nowhere near as powerful as yours yet I'm getting pretty good (40-60) fps on my main screen (details set to default "High" setting, not quite 'Ultra' like I had on XP-32 but I can't see a difference), and the 2nd and 3rd wows are locked at 15fps on 'low' detail.

Core2duo E7400 2.8GHz
4GB single-channel DDR2-800 RAM (lame mobo doesn't support dual-channel)
GeForce 9600GSO 768MB PCI-Ex
Win7-64 RC1
nForce 610 series mobo chipset



My whole point on that is it's got to be a setting somewhere. See if your Vista nVidia control panel has an Ambient Occlusion option under 3D settings, if so, turn it off!