It keeps jumping, when it is @ 9X 'C, i dunno about others, but my MBP always reaches these temperatures. How about yours? We need more HW professtional like you in this forum.
Angus
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Late 2008 Macbook Pro Overclock [ UPDATED ]
- Thread starter lscangus
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It keeps jumping, when it is @ 9X 'C, i dunno about others, but my MBP always reaches these temperatures. How about yours? We need more HW professtional like you in this forum.
Angus
I only have limited testing experience on the Aluminium MacBook. A lot of users reported that the new laptops didn't spin up the fans on YouTube. Flash is a known CPU hog in OS X so I decided to investigate. The new laptops are quiet during Flash playback. I watched the processor diode keep climbing and climbing while the fan spun at an idle 2000 RPM until it was over 90 C.
Most of my experience comes from my White MacBook 2.2 GHz. On the Windows side I have a years of overclocking and tinkering experience.
Not to mention I love doing research.
Yes, I'm a Liberal Arts major. My engineering friends beg me to help them to write papers or how to do research.
I only have limited testing experience on the Aluminium MacBook. A lot of users reported that the new laptops didn't spin up the fans on YouTube. Flash is a known CPU hog in OS X so I decided to investigate. The new laptops are quiet during Flash playback. I watched the processor diode keep climbing and climbing while the fan spun at an idle 2000 RPM until it was over 90 C.
Most of my experience comes from my White MacBook 2.2 GHz. On the Windows side I have a years of overclocking and tinkering experience.
Not to mention I love doing research.
Yes, I'm a Liberal Arts major. My engineering friends beg me to help them to write papers or how to do research.
In MAC side, the fan seldom spins up. Is there any software which can revel the actual core speed in MacOSX?
It will eb great if we cna get more OC expert on mac OCing, even in macOS, i am very interested in under-volting the CPU.
Angus
http://www.coolbook.se/CoolBook.html
http://netkas.org/?p=72
http://www.bresink.com/products.html
https://forums.macrumors.com/threads/460146/
You found the right person to ask. *evil laughter*
Coolbook doesn't support UNIBODY macbook yet = =
No hope on that one.
Hardware monitor is a very goo software which you have provided, but it is a pay software.
Next step, is to control the voltage and clock of the 9400M chipset...
I am an architecture student myself, i do a lot of rendering, so it will be great if i can squeeze more juice form it when i need to rush the rendering for deadlines, and of course, undervolt to provide better battery life.
Is that your blog BTW?
Angus
My 2.8GHz MBP CPU cores are generally in the 40-50 C range. I just checked with a youtube video playing and several apps open: 48 C with fans spinning at 2k rpms.
edit: while compiling some code, the temps peaked at 85 C and still fans stayed at 2k rpms. What temp causes fans to rev up?
edit: while compiling some code, the temps peaked at 85 C and still fans stayed at 2k rpms. What temp causes fans to rev up?
My MBP CPU temperature range at 60'C - 70'C. It reli seems like mine one has some problem with the cooling.....
Angus
I've said over 90 C several times in this thread already. Try two instances "yes > /dev/null" in Terminal.
107'C thats a lot!
But i dun think the CPU-X is showing the realtime CPU clock.
I need someone's advice, should i return this machine? I got this computer on friday 2 weeks ago, so i still got 2 days left to say i need a replacment
Angus
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Funny, I'd be more interested in finding the minimum voltage for which I can successfully complete the base performance of this chip, therefore increasing battery life without sacrificing longevity or performance.
If you're doing something on your notebook that would warrant you to need to overclock it, you probably shouldn't be doing it on an notebook, you should be doing it on a Desktop.
If you're doing something on your notebook that would warrant you to need to overclock it, you probably shouldn't be doing it on an notebook, you should be doing it on a Desktop.
can you post a screenshot of iStat Dashbood? as i have google several users of Late 2008 MBP, all have similar temperature as i do, yours run exceptionally cool. BTW, i have the 9600 engaged
Angus
Eidorian, surely you know about SpeedStep?
For all who are unaware: Newer Intel processors have a feature Intel calls SpeedStep, which basically drops back the clock speed when the chip is under very light load. Usually, from what I've seen, it bounces it between full speed and 2/3rds speed (I know the Q6600 flips its multi between 6 and 9 to do this). Honestly, I think that is all this is.
facepalm.app
Why would SpeedStep be an issue at full load?
If it was idle then I'd understand. They're running Prime95 in the background. You saw Prime95 right? SpeedStep isn't going to kick in.
Well you can argue the name of the marketing lingo Intel puts on it, but the fact is the chip is stepping down to survive, stepping down it's speed, call it throttling or speed step, it's the same idea in different circumstances.
Not to mention a chip that hot will put strain on the GPU and Chipset which are on the same heatpipe underneath the hood...
SpeedStep's entire purpose is demand based CPU performance scaling.
This has nothing to do with overheat protection. I've already mentioned the heatpipe as well.
In post #19 the OP was commenting on the clock multiplier jumping rapidly between x6-10.5 even at load. I actually looked at the picture for temperature and load. I noticed that they were running Prime95.
J the Ninja thought it was SpeedStep in #38
I then replied about SpeedStep and Prime95 in #39.
All that led to your chain of events. At idle SpeedStep is usually going to keep the multiplier at x6 but a small amount of load can make it jump between the x6 and x10.5. Not to mention we're talking about overclocking a ~1" laptop. We're going to need to see fan monitoring in Windows as well. Which is why I recommended this or SpeedFan.
After all that it might even be a defective cooling solution or software drivers.
When a CPU throttles, it doesn't kick down for a millisecond... it does it for a while. That glitch you are seeing is likely nothing to worry about and could be the software program having the issue. It also may be that whatever program it loading the CPU is not keeping a CONSTANT load on it. Have you ever used Intel's Thermal Management Tool? This program (windows only) will max the cpu to get the cpu hotter than any other program on earth. It will actually get the cpu to load at about 120% of TDP. Here is a link, use this for load and see if the cpu jumps to 6x... http://www.anonforums.com/builds/TAT.zip
http://www.anonforums.com/builds/TAT.zipRight, but you can't exactly disable it's thermal protection features with EFI yet...
BIOS sure, EFI, not so much.
When a CPU throttles, it doesn't kick down for a millisecond... it does it for a while. That glitch you are seeing is likely nothing to worry about and could be the software program having the issue. It also may be that whatever program it loading the CPU is not keeping a CONSTANT load on it. Have you ever used Intel's Thermal Management Tool? This program (windows only) will max the cpu to get the cpu hotter than any other program on earth. It will actually get the cpu to load at about 120% of TDP. Here is a link, use this for load and see if the cpu jumps to 6x...
And yeah, they will kick down for as long as they want, be it a second, an hour, whatever, it's part of the way it works, if it's not immediately using all of it's power, it will bump down, that's the nature of these chips, my Q6600 behaves the same way.
install this to keep the heat down then you can really see what this bad boy can do:
http://www.macupdate.com/info.php/id/23137
http://www.macupdate.com/info.php/id/23137