2007-10-01 15:38:44 · 3 answers · asked by Bill R 1 in Computers & Internet ➔ Hardware ➔ Desktops
Modern CPUs heat up pretty quickly, 'cause they've got billions of numbers to crunch per second, and that's a lot of electricity flying across a really little space. So no matter what you've been doing, if you're processor has had to work at all, it's probably going to heat up at some point. To prevent it from overheating, your PC's fan kicks in. Sometimes it's when you run a math-intensive program, like something that contains 3D graphics, other times it's just the accumulation of all the processes you've run on it since you've started it up. Also, there might be a program running in the background that's eating up a lot of processor power. (Don't want to scare you, but if you're running Microsoft Windows and you dont' have a lot of security software installed, your PC might be "zombie computer" being run remotely, see http://en.wikipedia.org/wiki/Zombie_computer)
2007-10-01 15:48:32 · answer #1 · answered by Jon R 2 · 0⤊ 0⤋
Your PC thinks ahead of you and is asuming you are going to start using a lot of ram. So it boots up the fan to help keep it cool.
2007-10-01 22:47:12 · answer #2 · answered by Belgariad 6 · 0⤊ 0⤋
it is changing because your cpu is being used to do tasks which makes it heat up.That makes your fan go faster to make sure it doesnt over heat.
2007-10-01 22:46:07 · answer #3 · answered by tvps2vs 2 · 0⤊ 0⤋