Processor setting: Highest or Automatic?

[johnnyjibbs]

Just wondering... When I was creating a complex tune on GarageBand at one point it choked and I got a "Hard drive too slow" message. Then I got a "Switch CPU to Highest Setting in Energy Saver Preferences."

I've now got my PowerBook running on "Highest" while I'm plugged in to the mains. I have actually noticed an improvement in performace right across the board, even down to smoother expose, genie effect and dock magnification, etc. (Now completely silk :)).

My question then: does leaving the processor speed on "Highest" do any long term damage to my computer?

[tdhurst]

Nope, just runs hotter and depletes battery quicker (not a problem because you are plugged in). I have my 17" pbook on highest when plugged in, reduced when not. My 500mhz iBook was configured the same way, and there was zero long term issues.

[thecow]

No. I've had mine on highest on my powerbook for the last 3 years and its fine.

[Engagebot]

it wont do damage to your computer.

sometimes people make the analogy of a CPU to a car's engine (in terms of speed and workload, and sometimes even mileage.) Processors do not 'wear out' with heavy use or anything like that. In fact, you could run your processor at 100% from the day you got it, and you would never do any 'damage' to it.

Those settings limit the horsepower of the cpu only to help conserve battery life. on the 'limited' setting, your processer runs a bit slower, but consumes quite a bit less power. Put it on 'reduced' setting for battery power, and 'highest' for your plug-in, and you wont have any problems. (unless you want to use Garageband on battery power, then you can just fix your settings to all highest.) automatic setting is pretty much useless, because its just between the two. it would be obvious to most of us that it would reduce the cpu power on battery time, but crank it up on a power adapter, but this isnt the case. the automatic is just good at neither really.

[johnnyjibbs]

Great, thanks!

The fan's just kicked in, even though I'm not really running many programs, so that's just the only side effect I guess but these PowerBooks seem built to last, so no problems!

[johnnyjibbs]

Originally posted by Engagebot
automatic setting is pretty much useless, because its just between the two. it would be obvious to most of us that it would reduce the cpu power on battery time, but crank it up on a power adapter, but this isnt the case. the automatic is just good at neither really.
I always kept it on Automatic because I was under the impression that it ran on high for heavy photoshop work, etc, and then reduced during web-surfing times, etc. But, as you say, it doesn't seem to work like this. I like the performance much better on Highest!

BTW, the fan's now stopped again, so it's not really that bad! Overall, this is a very quiet machine anyway...

[johnnowak]

I have a 25% increase in CPU power when running in "highest" under Reaktor (audio software).

[markjones05]

Is this little trick only for laptops?

[mactastic]

Originally posted by markjones05
Is this little trick only for laptops?

Yeah, desktops wouldn't benefit from this at all.

[tdhurst]

Originally posted by mactastic
Yeah, desktops wouldn't benefit from this at all.
Desktops either always run at highest settings or they can't be configured this way. But since they are always plugged in, there is no real reason to.
Back to the car analogy, processors have no moving parts (for all intents and purposes) so the only part you COULD wear out might be the fan, but that is highly unlikely.

[mactastic]

Exactly. There should never be a reason to want to run your desktop machine at anything other than 'highest performance' since it's always plugged in. In fact this option should only show on laptops. There are a couple of 'laptop-only' features, and this is one of them. Another would be the preferences for the trackpad. Since desktops use mice, you won't see the trackpad preference settings in your 'mouse' preference pane.