Universal power supply

Probably in the "dumb" question catagory and I think I already know the answer.......maybe someone familiar with this topic can explain it a little bit or point me in the direction of some reading material that explains what's happening with the power supply ..........when making use of the "universal" power supply capabilties in a foreign country that is using 240/50HZ power with a 120V/60HZ US model powerbook, will there be any speed differences in the computer when playing music sequences/pro tools sessions....will the audio "slow" down due to the difference from 60HZ to 50 HZ......how does the power supply compensate for the differences? Hope this makes sense!

it was a legitimate question......not too sure why you're so astounded with my inquiry
It certainly is a legitimate question, as is any question which falls within the Terms of Use. And I'm not astounded with your question. Both times I was clearly referring to the issues itself, not the question; as I said:
astounded as I'd be if there were any difference in any facet of PB operation on 120 vs 240.
I would, as I said, be astounded if this turned out to be an issue which had never before been identified.
One further point: if the voltage step-down occurs as I posted earlier, it shouldn't matter what application is running, as it would be running on the same DC voltage no matter what the external power source.
Guess I could run pre recorded test tones and measure.
Please let us know if you do run tests on both 120 and 240; I'd run tests with batt too. As I'm sure you already know, it's important to rule out as many other variables as possible. One thing I would pay particular attention to is the setting for Processor Performance in Energy Saver>Options. I wonder if it's possible that going back and forth between the different power sources could change settings such as this. In any case, real world beats theory almost every time, so it'll be interesting to hear about what you find.

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    Miriam--
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    William Hopkins
    Former Staff Sergeant, USAF
    B.A., B.S., with Honors
    The University of California, San Diego
    [email protected]
    P.S. It should be noted that while Enermax, ThermalTake, Zalman, Fortron, and others make great PSU’s, and I compared and considered them, the Antec still won out overall in my critical evaluation, like it did in so may others’ reviews. You’d probably be ok if you went with another reputable manufacturer as listed above, but pick a supply that gives you at least 230 watts on the 3.3 and 5V lines combined, and still meets the 30% criteria as stated above. Remember, if the manufacturers don’t give you maximum combined specs up front, they’re untrustworthy right off the bat. With power supplies, you definitely end up getting what you pay for. Don’t say nobody warned you.
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    Ok, as an electrical engineer...I have to step in here! LOL
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    Here is the product page for the HardCano12 unit:
    http://www.thermaltake.com/accessories/hardcano/a1845.htm
    I'm fairly sure that it's not my overclocking as I was able to sustain those speeds even before doing the case upgrade and modding on a (generic) Turbolink 350W power supply.
    The HardCano seems to draw on the 12V rail. What other components typically draw on this? I'll see if I can calculate it out and see if I'm just trying to draw too much juice.
    Sorry for being such a n00b when it comes to this stuff. I don't know a lot about electronic engineering. I guess I should have paid more attention in university physics. LOL

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