fans don't ever speed up?!

That's your problem. You have third party hacks to control your fans. Your machine can control its own fans and temperatures better than you can.

Hi

Why are you still using Leopard 10.5.6? Updates sometimes contain fixes to these types of things. You should at least upgrade to the latest (10.5.8? - not sure since I upgraded to snow leopard)

I used to have fan issues too, but since Snow Leopard 10.6.2 the fans are much more responsive and seem to work really well. I think 10.6.2 fixed the fan/heat issue. At least it did for me.

Best,

M.

Also - I have SMC fan control (don't really need to use it anymore) but it has never interfered with the native fan/heat control on my MBP. It's designed to NOT interfere with the native control.

M.

" It's designed to NOT interfere with the native control."


The software is expressly designed to interfere with the fan controller - that's why some people use it.
Have you reset the SMC? Have you tried removing the hackish third-party software that you installed?

SMC fan control - in my experience does not interfere with the native fan control from ramping up the fans to a higher RPM than the SMC FC is set to. For instance if I had it set to 3,000 rpm and the machine from use needs to ramp up to 4,000 rpm it does not stand in the way of this process. Also, SMC fan control has a limit to how low the fans can be set. Pretty much 2000rpm or where the MBP generally hovers. In other words you can control the fan speed but you do not interfere with the native fan control of the MBP.

Hello.

I have same problem with my Late 2008 15" MBP.
Fans don't speed up above 2000 rpm until cpu reaches 110°C

I have tried to get Apple to fix my machine but so far I've been told that this is normal.

I dont consider buying 2800Mhz computer and getting 1600MHz computer (due to throttling) normal?

- Hount

How does it not interfere? What do you think SMC Control is doing?

If you have been told by Apple that that is normal, then its normal. I wouldn't worry about it.

Also, in the future create a new thread to ask your question. It will get noticed better.

evan127 wrote:
That's your problem. You have third party hacks to control your fans. Your machine can control its own fans and temperatures better than you can.

No, it's not his problem.
It's a problem with almost all the Macs. Apple seems to be more focused to keep Macs quite than cooled, so the default fan's setting it's weird.
A cpu working at about 90°C (like mine under a load!) when the cooling system of my Macbook Pro can easily keep it below 80° C it's not a nice thing to have.
Using a simple program like FanControl (or smcFanControl) you can lower the temperature of your cpu by 15°C (a lot !!!), discharging Apple's insane setting.

my two cents



PS: BTW my Mac Mini behavior is almost the same ...

Message was edited by: Max(IT)

Hount wrote:
Hello.

I have same problem with my Late 2008 15" MBP.
Fans don't speed up above 2000 rpm until cpu reaches 110°C

I have tried to get Apple to fix my machine but so far I've been told that this is normal.

I dont consider buying 2800Mhz computer and getting 1600MHz computer (due to throttling) normal?

- Hount

Trust me, it' s not normal at all ...
A cpu can live at 100°C, but it is very near his operational limit.
Download FanControl, set the lower threshold to 60°C, set the upper threshold at 90°C, and your Mac's fan will keep temperature under control, accelerating the fan ONLY when needed (under full load of both cores my MBP's cpu is at about 80°C with fan at 3400-3600 rpm)

If its near its operational limit the computer will kick in the fans to cool things down, unless something is truly wrong (then which the computer will shut itself down to prevent damage).

To the original poster; if you want to watch your computer's temperatures every single minute you are using it and adjust the fans accordingly to every different temp across your computer, download SMC Fan Control.
If you want to use your computer the way it was meant to be used, let your machine cool itself down and don't worry about it. If there is something wrong, you will know.

evan127 wrote:
If its near its operational limit the computer will kick in the fans to cool things down, unless something is truly wrong (then which the computer will shut itself down to prevent damage).

the problem is that by Apple's default the fan accelerates too late (above 85-90°C). The computer is keeped within operational limits, but it' s absolutely not a wise thing to do (electromigration , do you know ?)

To the original poster; if you want to watch your computer's temperatures every single minute you are using it and adjust the fans accordingly to every different temp across your computer, download SMC Fan Control.
If you want to use your computer the way it was meant to be used, let your machine cool itself down and don't worry about it. If there is something wrong, you will know.

You are misleading ...
Using utilities like smcFanControl or FanControl the OP has to do NOTHING: once you set it up, temperatures are keeped under control in a better way

Message was edited by: Max(IT)

I can't say for sure, but it sure seems like Snow Leopard is more aggressive with the fans than Leopard. Just an observation since you seem to have Leopard.

charlie

I agree. Snow Leopard seems to be better with speeding up the fans when they need to be. I use smcFanControl and it does not interfere with my fans and Apple's fan controller managing them. I have fans set to be running at 2500rpm on my late 2008 MBP and it seems to keep a fine temperature. I will kick them up to 6000rpm when I am play games. When I am using Photoshop I have them at 2500, and if I start to do rendering or processing that heats up my CPU a bit the apple fan controller will kick in and speed up my fans above what smcFanControl has them set to. I have not experienced any sort of bad effects from using smcFanControl.

CT wrote:
I can't say for sure, but it sure seems like Snow Leopard is more aggressive with the fans than Leopard. Just an observation since you seem to have Leopard.

charlie

I have Snow Leopard, and my MacBook Pro behavior is the same.
Same thing for my Mac Mini (Snow leopard).

Apple seems to be much more focused on keeping computer silent than cooled