Fan gets louder when put into sleep mode

For my first month of having Windows 7 (Ultimate, 64-bit, 4x2gb ram, Intel Pentium 4 3.8GHz) my sleep mode worked fine. It would enter sleep mode, the fans would slow down to an almost muted level.

After that month, every time I entered sleep mode my fans would get louder, not quieter, and continue running at the same loud volume until I woke the computer up.

I have the stock Dell fans, and no fancy fan software installed.
My BIOS is set to S3 sleep, my power plan set to high performance with my advanced power settings as thus:
Sleep After: Never
Allow Hybrid Sleep: Off
Hibernate after: Never
Allow wake timers: Disable
System Cooling policy: Active

Any help with this problem please?

Crispy said:

Two thing you can do is update the bios and try SpeedFan its an application that allows you to control the fan speeds temps and more: SpeedFan - Access temperature sensor in your computer

Right now I have Dell A06, and I downloaded the Dell A09, but it isn't letting me install it from Windows? I get an error that says Windows Configuration Error: An error was encountered trying to configure windows to allow flashing, please reboot and try again blah blah.

I believe this is the right BIOS for my Precision 380?

notsograymatter said:

I strongly urge you to use hibernate mode instead of sleep mode. Sleep mode works wonders on Unix based machines but completely boggles DOS based machinines.

When sleep mode shuts down almost everything but essential hard ware, it can really mess up settings inside Windows for some reason.

Hibernate on the other hand shuts everything down after moving active files, memory, etc to a special disk. When you resume from hibernate, you'll still have to boot but it'll be a bit quicker than a regular boot.

Yes, I've been using hibernate ever since the fan problem started, but I really like the speed in turning on from hibernate :V

I noticed, in your power plan settings, "System Cooling Policy" is set to "Active". In Win7, policy can either be active (like yours) or passive. In the active setting, when the cpu heats up, the fans will come on and cool it down BEFORE the processor is throttled to protect damage to the processor. In the passive setting, it is reverse and the processor is throttled first. So try changing that setting to passive and see if that helps.

From your power settings, I guess you may be a gamer or at least do some cpu-intensive stuff on your machine like video. If not, then try changing your power plan to balanced. Within this plan you can tweak the Min and Max Processor States to your liking for both a/c power and battery.

Bill2 said:

I noticed, in your power plan settings, "System Cooling Policy" is set to "Active". In Win7, policy can either be active (like yours) or passive. In the active setting, when the cpu heats up, the fans will come on and cool it down BEFORE the processor is throttled to protect damage to the processor. In the passive setting, it is reverse and the processor is throttled first. So try changing that setting to passive and see if that helps.

From your power settings, I guess you may be a gamer or at least do some cpu-intensive stuff on your machine like video. If not, then try changing your power plan to balanced. Within this plan you can tweak the Min and Max Processor States to your liking for both a/c power and battery.

Nah, I changed that to "Active" long after I started having this problem :/
It's also not because of my selected plan. I'm on "High Performance" for powering my two screens and multiple adobe applications often open at the same time.