I am having this small issue with my leadtec gts 250 cooling fan. The pwm type fan is driver controlled and revs at full speed on startup until the win display drivers get loaded. The fan responds ok to high temp on load and increases speed but fails to slow down after returning to idle even after >30min when things have cooled down. The gushing noise gets kind of annoying, I need to restart my pc to bring the speed down. using 190.38 x64 drivers on win7.

came out to be a driver bug specifically for gts250 on x64 win7. both 190.38 and 190.62. found it mentioned in the known issues of driver documentation. downgrading to 186 all is normal. dont know in detail the improvements of 190 over 186 but I hardly see any diff in FPS or ingame visual quality.so what I want to know is are new 190 drivers worth the bug or should I stick to 186 till the issue is resolved in a future version?

You can also manually control the fan by a program like RivaTuner if you would like. This is what I do.