Basicaly when the x1950xt changes from 2D to 3D clock speeds it requires more power...only thing is taht for whatever reason this will crash the card with the 7.1 vista drivers. Basicaly the only "fix" is do dissable the CCC which is what changes the clock speeds. these '7.2' unofficial drivers http://drivers.softpedia.com/get/GRAPHICS-BOARD/ATI/ATI... will let games work...but no 3D clock speeds, so games should play slower than in XP (though I have noticed that I have a few games that run just as good or only lost 2-3 FPS)
but why in XP runs great with the same 7.1 drivers ? is a vista problem then ?
another thing that happens to me is when i start the computer the MB fan turns slower to fast and fast to slower all the time, only with the 1950XT, i don't understand.
Here is the thing...they are NOT the same drivers as the XP drivers. It is possible that it is either a Vista problem or a bad job in the coding of the Vista drivers. As for a fan going up and down that has nothing to do with the OS, that is a problem with the mobo and bios.