Inspiron 1525 Fan Issue

[maxima1274]

Originally Posted by bobnova

The bios may turn off speedstep and other power saving measures while the laptop is on AC power. Less power consumed = less heat generated = less heat to get rid of.

You might look in your bios to see if there are any options for when speedstep and such work.


EDIT:
It's worth noting that all power used in your laptop is turned into heat, with the very small exception of the light produced by the backlight in your screen. All the rest of it turns into heat.
Charging batteries produces heat, and if the batteries are near the chip that may change how much the chip heatsink and heat tube can get rid of passively.

Yeah, that's exactly what I was thinking.

Also, when I go into bios to look for speedstep, what should I do when i find it?

[bobnova]

Make sure it's turned on full time. I have no idea whether that option will be there or not though.
If it isn't you should look for what differences in OS operatiuon there are between ac and battery, every os i know of has seperate power options.

[bobnova]

So on my mini9 the setting in windows for power profile makes a large difference.
Always on sets the chip voltage higher full time, where desktop lets it follow the speedstep stuff. The difference is ~4*c on the passively cooled mini9/atom.

[maxima1274]

Originally Posted by bobnova

So on my mini9 the setting in windows for power profile makes a large difference.
Always on sets the chip voltage higher full time, where desktop lets it follow the speedstep stuff. The difference is ~4*c on the passively cooled mini9/atom.

So what should I change the battery settings to?

[bobnova]

The dropdown boxes appear largely irrelavent to performance.
I have mine set to turn the screen off after ten minutes, sleep after 20, and hibernate after an hour. I tried shorter and i didn't like it, so now i'm trying longer wait times, seems to work decently.

It's the main dropdown box with the "profile" in it that makes the difference as far as i can tell, i haven't done a LOT of testing yet.


NOTE:
Those are my settings for a mini9, which has a 4-6 hour battery depending on usage.