Everyone with T43 fan problems

[Navck]

Try this
Make your own profile with the IBM utlity

Battery -
Maxium CPU Speed - Adaptive
Fan control - Balance all parameters
Brightness - 5

AC power
Maximum CPU speed - Adaptive
Fan control - Maximize preformance
Brightness - 7

Everything else - To your favorite

Now, after a while, swap fan control "Balance all parameters"

Notice a sudden noise drop? I sure did on AC power.

[Kel Ghu]

I posted bout this already....

"Maximize performance" lowers the fan speed... dont ask me why, i dont know. It's stupid, since it sets the graphic card to max perf.

[danny_isr]

i noticed another thing.
when the temp is around 44 or less and the fan is on the high side.
if you just change between the modes doesn’t matter which one, the fan will go down.
it's like getting stuck and only when I’m switching to different one it's going to the correct RPM.

[frogla]

Could it be that the reason the fan stops/ goes to a lower level when changing to Max performance is because a higher working CPU temperture is tolerated before the fan kicks in in this setting?
In my experience you can stop/reduce the fan speed by changing to "Max performance" -also in battery setting-but at the expense of battery time.But the fan kicks in at a higher pace eventually -it is only a matter of time-that is when the CPU temp reaches just a little higher level of temperatur than is the case in "Battery saving settings/ low CPU settings".

[GeorgeP]

I have a T43, 15 inch (2687-DDU). I think the fan noise can be annoying, but it seems pretty senstive to ambiant temperature. It is pretty quiet in a cool room... a few degrees warmer and the fan runs loud. However, I've found that CHC is an excellent way to make the fan run very quiet.

A few general observations (with Power settings set for "Maximize Performance" (ThinkPad Default)):

- My fan is pretty inaudible below 43C. (I think this is the lowest fan level)

- At about 43C or 44C, the fan moves up to a second level. At this level it is still a very quiet "whoosh" sound.

- If the temp continues to move up, it clicks to a third fan level, where it begins to get annoying. It reaches this point either when it has sustained a couple minutes above 45 or quickly after reaching about 51C.

- When the core temp moves down, the fan will move to a lower fan level, but not until it reaches 2 or 3 degrees C lower than the point at which it move up to that level. (presumably, this is to keep the fan from cycling too much. The problem is it can take a LONG time to move down those 2 or 3 degress. You can get the fan to the next lower level faster by clicking the battery icon and selecting the same power mode again (I use ThinkPad default). The cycle resets and "forgets" it was trying to get to 2 degrees below the trip point, but it is just a matter time, with the same workload, it will get back up there. IBM's (I think IBM designed the T43) objective with the algorthm was probably to minimze cycling, at the expense of the fan running more. This is probably the ideal algorithm for the median user, but maybe not ideal for one that has an occaisional spike and works in a warmer-than-average ambiant temperature.

- Undervolting with CHC does an excellent job of reducing fan noise, even in my temporarily non-air conditioned house. Before CHC, my core temps were in the high 40s. That put me in the annoying fan category. With CHC, my core temps are mostly between 41C and 43C. The temps will spike briefly to 50 or so, but the fan algorithm fortunately tends to not select a higher level, unless the temp is sustained. Overall, the fan very quiet now. It is too early to tell for sure, but I have had no problems with undervolting.

- On another note, I also don't following the logic for the fan running faster in the "Balance all parameters" mode It was suggested that higher CPU temp is tolerated in Max Performance mode. ...Why? if it is OK for the CPU to run hotter, why not just raise the trip points on "Balance all Parameters" to make that mode quieter.

- Bottom line, if your experience is like mine, you will get a very quiet T43 using "ThinkPad Default" (fan control at maximize performance) and using CHC to undervolt.

G

[zane]

The fan of my t43 is always running and I noticed the temperature was about 59C at idle(my dell D400 1.4G is about 35C at idle). I don't know what's the temperature of your machine? I also noticed the very high temperature at the area under touchpad. Is that the x300 chip position?

[emorphien]

My T43p idles on adaptive in the low 40s in a room around average temp (75F or so).

[zane]

Thank you, emorphien.

There must be something wrong with my machine. I just shut down it. The temperature reported by acpi is 91C and the fan is blowing like a jet plane when I let the door of DVD driver open for a while. It is amazing that the computer is still stable.

[Jmmmmm]

You might have spyware running that is making your processor run at full speed constantly. Check the processes and see if anything is taking up all the CPU power; I had something running that caused my computer to constantly be at ~72C

[JHaislet]

All that did (switching to Balance All Parameters) was enable ATI's PowerPlay, which dropped the X300 from 300mhz to 105mhz. Fan speed didn't change. However, my fan stays on the 2nd lowest setting almost all the time with temps staying around 44-45c when downclocked to 800mhz.

The 2nd lowest fan setting is still audible, and is fairly loud if your in an absolutely quiet room. However, when the central AC kicks on in my house, I can barely hear the fan over its noise. Also, if you've got the TV on, its hard to hear it.