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with the mba 1.6/80 ootb the following seem to be common - video stuttering, heat probs, high fan speeds/noise due to high temp, core shutdown at non-critical temps, processor not providing true 1.6 two core performance/actually only see blips to 1.6 even though processor load is pegged.

i have found cooltemp to correct all of this. the factory settings on these units leave them frustratingly crippled.

and, yes stock is running at more voltage. up to ~ 28% more voltage. less voltage should provide at least three additional bonuses

1 - i haven't seen anyone really quantify the additional battery run time but it should be noticable.

2 - the same electronics running at lower voltage typically have significantly longer life.

3 - less heat extends service life of components and service life of batteries

an excellent undervolting program would be expected to help make your notebook a little more efficient by dialing-in your specific processor.

with the mba it's a different story. coolbook adjustments make a night and day difference in the mba.
 
But, like I said earlier, the CPU is already being throttled and voltage-reduced automatically, and also pretty low. I guess the one advantage of Coolbook, is that you can find the "best fit" for your machine and hence maybe lower the temps a bit. But I guess on some machines the best fit will be pretty close to the original settings, making the app more or less useless for some.

Yes at low frequencies you will not see a difference... unless you add the 600MHZ option.... but just to see.... through coolbook apply the 1.6 GHz option at the stock Voltage 1. *something* and then boost the CPU Usage bar to 10.... watch as the temp rockets to like 85 even 90 in seconds.... then apply 1.6 GHz at 0.9125 (stable Voltage for my CPU) and the temperature never goes over 80.... so... unless these CPUs vary drastically from one to the other.... then you should see a difference in the intensive task.

just my $0.02
 
I'm beginning to think that the SSD MacBook Airs are the only ones without any problems.

Honestly I think 99% of this thread is nitpicks. Yes there are genuine problems out there but some people out there are talking about an electronic item making a noise being a defect? Get real. You go to any store with laptops and you will hear all of them running. Each and every one. They all have moving parts, moving parts make noises. Just be happy with your purchase and be glad you can afford a mac. I know plenty of people who would love to have one but have to settle for low end windows machines.
 
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