I\'m on a Mac 1.33 GHz PowerPC G4 with 512 MB DDR SDRAM. When I start up the boinc for climate prediction (YES I got it running just fine) The problem is that it runs too well. The fan turns on shortly after I start the program. I looked at my \"online\" preferences to see if there was an adjustment there I could make - nada.

I have everything else on the computer shut down and it\'s still running and running HOT.

Suggestions, ideas?? buy a new computer ;)

TIA

> What are you using to measure the temperature?

It's a laptop. The "temperature measure" is my ears. My ears hear the fan kick on shortly after starting boinc and shortly after I close it down.

I do other processor intensive work and don't get the fan to run constantly over time. Watching it run "hot" with the fan on for over an hour made me a bit worried.

Thanks for the utility. I will check the actual temp. I don't want to damage the computer but do want to help out....

:)

I have this problem on an Apple 12" PowerBook G4. I guess once the system sees a high load on the CPU it starts the fan *before* the CPU gets too hot. However my system 'idles' at around 45.3 deg C and with a high load shoots to 55.9 deg C in a few seconds. I've not left it running for long periods under full load simply for this reason.

A useful feature would be to have a way to limit the CPU usage* for the client - say 'Limit load to 25% of CPU', I know this will effectively lower the computational power of the system but would help for those of us who don't want to cook our lunch on our machines!

*apologies if this feature exists and this is a case of RTFM.

Of course if you used a PC you would soon get used to hearing the fan running continuously no matter what the cpu load. :)
Cheers,

PeterV.
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I too am using a Mac G4 (Dual 1.25GHz). Right out of the box I found the fan noise excessive, as did many others (check out http://www.g4noise.com/). The fans ramp up in stages, a big increase coming at about 59°C. I ended up installing an aftermarket fan kit to preserve my sanity, which has made it run much quieter. I also monitor CPU temperature with 'Temperature Monitor', and all this summer have seena faily constant 59°C. When running BOINC (one model on each processor) this rises by about 1°C. I'm guessing that when you run BOINC you cross over the threshold that cranks your fans to the next level.

There is a file that contains the commands for the temperature steps at which the fans ramp up speed, and you can edit these although I wouldn't recomend it.