Nvidia GFX Driver  

I do not know the mechanics of Video drivers, but my own experience with one of my laptops might help others with older cards. (Go 7600 in my case)
The built in "7" driver worked fine for me, except for a couple of sites (maybe there were many others) where I got a strange, and unreadable, kind of "quad" effect, There were four, poorly rendered, pictures where there should have been the one. With a lot of tests, it did seem to be some conflict with Java.
I tried different drivers, past and present, even third party. I was on the point of temporarily giving up on "7".
So then I reinstalled, accepting Microsoft's drivers. I downloaded and expanded the latest drivers to a designated folder.
Back into the device management and selected "update drivers". I pointed the panel at my new folder and "7" got excited and installed the drivers. I now have a machine working perfectly, whatever I throw at it! Why it would not work with a normal Nvidia install, I have no idea.

I installed win7 beta x64 yesterday and allowed the generic drivers to be installed, I have a XFX Nvidia Geforce 8800gs with the (prerelease WDDM 1.1) It plays my games well with the win 7 drivers, but when I play a movie it is not clean or crisp like it should be, adjusted the resolution a couple of different ways and still no joy. I then updated my drivers to 181.20_geforce_winvista_64bit_international_whql and the movies where brilliant and clean and crisp once again, but now my games are flickering everywhere, i tried the adjust the game resolution and even set compatibility to Xp sp2 and still no joy. I have reverted back to the Win7 driver and the games play fine but my video quality is **** once more.
Any help would be appreciated.

Windows 7 Ultimate Beta (build 7000)
AMD Athlon x64 dual core 5000+ 2.6ghz
4 gb ATI Crossfire OCZ 800mb DDR2
MSI MS-7280 K9A-Platinum
XFX Nvidia Geforce 8800GS 580M 384MB DDR3 DUAL DVITVPCIE