New build- Issue with fan speed spikes in standby

[mrwhatsit]

So I recently built a new pc.

Mobo:Gigabyte Z77 D3H
CPU: i5 3570 @ stock
GPU: GeForce GTX 670
PSU: Thortech 850w
RAM: 8 GB DDR3
HDD: WD 1tb
SSD: Samsung 840

So I'll try to explain the problem a little more. I like to sleep with my computer still running, normally the build is really damn quiet. However sometimes after its been in standby for awhile, the fans will sky rocket and it will sound like a jet for maybe a minute or so and return to normal.

Any ideas of what I can do to isolate the problem, or maybe someone has a solution for it.

Cheers in advance!

 

[T_T]

In the BIOS, you can adjust your CPU fan settings. If you want to control the case fans, install a fan controller.

 

[mrwhatsit]

Thanks for the reply.

Can you think of a way for me to figure out which fan that is actually doing it?

I guess I should try setting the CPU fan to a little higher

 

[T_T]

My guess would be the CPU fan is the one that got loud. Most BIOS have an option that automatically controls CPU fan speed, based on the CPU temperature. AMD CPUs are controlled by Cool 'n Quiet, while Intel CPUs are controlled by Speedstep.

These technologies allow the CPU fan to speed up to keep the CPU cool, but also allow the fan to slow down to save power, when the CPU isn't under heavy load. If you have a system that you built yourself (as opposed to an off-the-shelf style), you should be able to disable Speedstep and C 'n Q, respectively.