For some time the fans of my graphics card does not run when the PC is idle, keeping a temperature of 50 C. When I start using it without force it on facebook, mail, etc. the temperature rises to 69 C, the fans will come on and bring the temperature to 50 and stop working again. In the game, the fans stand still until they reach 76 C activates the fans with a BIG NOISE, bring the temperature at 65 C and stops turning, and it runs only one! And 'the wrong operation of the graphics card (broken?) Or are your drivers? What can I do ?
Actually for some cards this is a "power savings feature"!
Check with your GPU manufacturer to see spec's for your GPU and what features it has.