[SOLVED] Fan speed spikes. Why?

[ch33r]

The fan speed on my CPU likes to randomly spike. It seems to idle at 1800RPM and will randomly spike up to around 2800, even when nothing is open, just sitting there staring at the desktop. Specs are listed below. CPU is using original stock cooler. Why does this happen and how do I fix it. Also, is there a way to make it so the fan speed doesnt pick up until the CPU hit a certain temperature? Say 60ish or so? Can I set that?

 

[CountMike]

Fans react to CPU temperature which depends on voltage which in turn reacts to demands on CPU. It's enough for one core to spike for voltage and temperature to do same. Temperature you see and fans react to is temperature of highest core.
What you can do is to set fan speed curve in BIOS to adjust speeds so it doesn't speed up (much) at lover temps like 60 c for instance.

 

[Paperdoc]

The fan speeds may be spiking because they NEED to, so be cautious about trying to defeat that! YOU may not be doing anything for a while, but it's amazing how much background work Windows does when the system is "idle"!

As CountMike said, fan speeds is governed by the actual temperature measured inside the CPU chip. If it goes up for any reason, the fan is supposed to speed up to provide more cooling and reduce the chip temperature. This CAN happen even if you think you are doing nothing. Also, there are SOME CPU chips (not sure if this includes yours) with a known "bug" that causes them to register a sharp increase in temperature when certain "simple" changes in workload happen, causing fans to speed up and then slow down again over a short time. There's really nothing you can or should do about this except exercise patience and tolerance for noises.

 

[rubix_1011]

Is this one of those 'I want my CPU cooler to use PWM to ramp up when it needs to but I don't want it to ramp up' questions?