Hello, I have a GTX260 black edition graphic card. Recently when I run a game with heavy scenes for process such as Assassins Creed or Resident Evil 5 graphic crad`s fan orbits very fast and some noises appear on the screen frequently. In some other games there is not any problem. Could you help me please?
Check the temps on the card. Older cards tend to build up dirt and dust that will increase temps, which can cause fluctuations like that. Giving your whole case a good cleaning every few months works wonders on temps and helps keep dust down. All you need is a can of compressed air and give it a good spraying out.
If temps aren't your issue have you installed the newest drivers for your card?