When on "Maximum Performace" CPU makes a high pitched noise.

When my T61 is set to Max Performance it makes a high pitched noise. But on the rest of the profiles there is absoutly no noise... Any ideas on the problem?

Hello,
yourThinkpad suffers from so called cpu whine.
Please look at this thread.
Kind regards
Andreas
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To Apple Engineer. I hear a high pitch noise when surf flash-intesive sites

Hi. All.
I have a Aluminum PowerBook G4 1.25Ghz SD. I agree this is a great machine. It has a somewhat out-dated G4 Chip in it, I can do almost everything I need.
I've been using this powerbook for 2 years. Since sometime ago, I've heard very annoying "Hige Pitch Noise" from PowerBook. From further investigatin I found that this was a problem related to G4 CPU Processor throttling- so called "NAP" status. In Flash-intensive Web site, I clearly hear the noise.
According to solution suggested by talented apple user, I did followings.
1. Download or Install Developer Tools.
2. Download and Install CHUD tools from ftp://ftp.apple.com/developer/ToolC...ormancetools/
3. After installing chud tools, there maybe Processor pane in preference app.
4. In that processor pane, you should uncheck "Allow Nap" to reduce the notorius High Pitch Noise.(warning: it may increase the power consumption and temperature of CPU a bit, and of course you would see more frequent activities of CPU fan than before)
5. feel the silence.
To Apple.
I think this solution should be suggested from you not users.
Why we investigate, search the web for thosand of bucks PowerBook. Please fix this annoying(yes, annoying enough to cause headache) problem in next OS update.
To readers.
Sorry to my poor English(I live in Seoul, Korea)

These are user-to-user discussion boards. Apple employees do not take part in or respond to posts on these boards.

High Pitched Noise When Recording From iSight Camera

I apologize if this has been asked before. I did a search on here as well as with Google.
Whenever I record a video clip using the built in iSight camera I notice that there is a constant high-pitched noise embedded in the clip. You don't hear the noise during recording, and otherwise the audio is crystal clear during playback, but I can't seem to figure out what is causing this noise. Video clips I import into iMovie don't have this problem. Has anyone else experienced this problem? How can I prevent this from happening with future recordings?

Hello obsidianspider
I am sorry to report that you are one of about ten people who have posted here about audio noises during video recordings with MacBooks. I listened to your YouTube clip, and I believe you are hearing something. I can hear the muffled "thumping" of background noises being amplified because there is no voice or other close sound being recorded in your video, but my old ears do not hear anything high pitched in your video (or anywhere else for that matter.)
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We users who post here have found no solution yet, so the problem appears to require professional service for resolution.
However, if you are willing to try a test, please post back and tell us whether video or movie clip recording applications other than Apple's give the same audio noise you hear when using iSight with iMovie. Apple's QuickTime Pro has already been tested and found to exhibit the problem.
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http://discussions.apple.com/thread.jspa?messageID=4483866&#4483866
If you want to read what other users who experience this (or similar noise) problem, you can find them in these two threads:
http://discussions.apple.com/thread.jspa?threadID=972540
http://discussions.apple.com/thread.jspa?threadID=1136286
If you or any other reader finds a solution, please share it.
EZ Jim
PowerBook 1.67 GHz w/Mac OS X (10.4.10) G5 DP 1.8 w/Mac OS X (10.5) External iSight

When on "Maximum Performace" CPU makes a high pitched noise.

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