CPU only clocks up to 1.2GHz on full load

I use Boot Camp on my Late 2007 17" 2.4GHz Macbook Pro, with fresh installs of Snow Leopard and Windows 7. I've used Windows 7 to diagnose my problem. I'm using Core Temp to retrieve my CPU performance info and Prime95 to stress-test the hardware.
Definite Problem:
My CPU will not operate at any higher than 1.2GHz under full load. It idles at 800MHz at 42 degrees Celsius, and warms up to 62 degrees Celsius under full load. I expect it to operate at 2.4GHz like it once did.
Best-Guess Diagnosis:
My computer has no battery (it physically expanded beyond functional size), and I read somewhere that the computer is designed to throttle down when no battery is present in order to prevent the computer from drawing more power than is available to it via the 85 watt charger.
Best-Guess Solutions:
1) If my diagnosis is correct, replacing the battery should undo the throttling cap. This is not ideal as it is not a long-term solution (batteries can continue to explode in the future).
2) I'd like to modify my computer's configuration to release the throttling cap/force full frequency. If possible, this would be the ideal long-term solution. This may not be possible if the charger is indeed bottlenecking my CPU's performance.
I'm looking for insight into my best-guess solutions or new solutions. Thanks for taking time to check out my inquiry.

Please carefully read and do both iMac SMC and PRAM reset s, if you need to do each 2X. It also may help to restart in Safe Mode to clear some caches.

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I would set that to Manual in BIOS, so that you can incremently increase the CPU speed without causing a sudden crash. Each system is different and operates within the specs of not only the CPU, but system memory and PCI-E add-ins as well. Your video card is the primary driver behgind your 3DMark scores...but you haven't listed that?!

694D Dead? Changed CPU Host Clock

Hello all,
This board was running great. I had to do a new OS install and started playing in the BIOS to overclock it. I wanted to change the CPU multiplier but did something with the CPU Host Clock setting. After I changed it the board, just died. It turns on, but the 4 LEDs are RED. I had two PIII 800 w/1GB RAM
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Sorry I wasn't more complete:
I removed the battery, flipped the Clear CMOS jumper to clear the CMOS and removed all power sources, removed everything (CPU, Cards, etc)
I let it sit for a few days.
I then but the battery back, flipped the jumper so it would boot, added just memory, 1 cpu, and a video card.
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CPU FSB clock

I don't know much of computers and i have just bought an Athlon XP 2000+ processor. What BIOS settings do i have to change to make it work at the correct operating speed?
I've anyone could help me, i don't wanto fry my PC.
AMD says it's 266 for the CPU FSB clock it this correct?
thanks
Montana

Welcome
It may be set up correctly now. What speed is your chip running now - about 1667 MHZ. How is chip IDed at startup - XP2000+? If not, say you have 2000+ Tbred, set FSB to 133 (266 DDR) and multiplier to 12.5 (think that's correct default). Be sure to give your motherboard manual a good read! Will help with settings.
Depending on your motherboard model, memory, cooling etc, you may (with some experience) be able to run that chip to 166-200 FSB. But don't try above 133 FSB without proper research. You can damage your system. You'll have to furnish your system details to get a better handle on its potential.

Setting BIOS CPU FSB clock to 333

Hello everyone,
I recently acquired the K7N2-Delta ILSR (MS-6570) motherboard; nVIDIA Next GF2 400 FSB DDR. The CPU is an Athlon XP 2500 1.85 GHZ, 333 MHz.
The mainboard specs states the Socket A (Socket - 462) supports AMD Athlon XP processors @ FSB 266/333/400. I have the jumper J11 on the board set to 'short'.
With all that said, I've tried adjusting the CPU FSB Clock Frequency to 333 in the BIOS Setup Utility yet 200 is the highest option it gives. Does the CPU Interface have to be set to 'High Performance'? Other adjustments necessary?
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200 mhz fsb is the correct setting, DDR is just that "double data rate" so 200 x 2 = 400 mhz
MikeB

Cpu fsb clock setting?

I bought a Microstar MS-6380E KT3 Ultra with an AMD Athlon XP 1800+ (1.53Ghz) 266FSB CPU -- it just got in today.
I have it all set up EXCEPT for the clock frequency. The 6380 has a default of 100mhz, up to 220. But the AMD Athlon XP 1800+ is supposed to be a 266 fsb.
I don't want to overclock my system -- am afraid to endanger my system when I really don't need the extra processing power. I just want it set the way it should be.
There's another field -- CPU Ratio/Vcore (V), w/ the following manual description for it:
The items are used to adjust the CPU clock multiplier (artion) and CPU core voltage (Vcore). The fields provide users a tool to overclock the system. WARNING: Changing CPU Ratio/Vcore could result in the instability of the system; therefore, it is NOT recommended to change the default setting for long-term usage.
I was gonna _guess_ that I set my CPU FSB Clock to 133 and input a CPU clock multiplier (ratio) of 2 (assuming I could do that). Is that the correct way to configure this AMD Athlon 1800+ to this motherboard? The 'CPU core voltage (Vcore)' descriptor is what is making me afraid of experimenting. I would really hate myself if I destroyed my new cpu and/or motherboard less than 6 hours of having received it.
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I doubt you can set the clock multiplier to "2" - simply it isn't available. Even if it is available and u hv not unlock your CPU, adjusting the multiplier ratio has no effect at all.
The default multiplier for 1800+ is 11.5x. Multiply it by 133fsb you get 1529.50mhz, hence xp1800+ (1.53G).
Don't confuse yourself, juz follow this setting if u r not overclocking:
FSB Clock: 133
CPU Ratio: AUTO
CPU VCORE: AUTO

Macbook CPU full load, 99 degrees celsius

On my late 2008 13" Macbook 2.4ghz when I run 2 instances of "yes > /dev/null" for 10 minutes to stress the CPU, the CPU temperature is at 99 degrees celsius even with the fans going at the maximum 6200 rpms and while using a cheap cooling pad. I took the computer to an Apple store "genius" and he thought this was normal. Is anyone else seeing temperatures like this using this stress test method? I looked at the website http://www.intelmactemp.com/ and highest full load temperature I see for this computer is 84 degrees celsius. I have noticed problems running intensive 3d games where the system slows down from high temperatures and more so under Windows XP.
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Hi MindBrain,
Saw your post last night but didn't have immediate access to 13" MacBook (Aluminum). So I've got a 2.4GHz unit with 4GB of RAM and ran two instances of the same command in Terminal.
All information is reported via iStat Pro:
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CPU Temp @ 5 minutes into test - 96 (fans at 2001 RPM)
CPU Temp @ 10 minutes into test - 97 (fans at 3100 RPM)
CPU Temp @ 15 minutes into test - 103 (fans at 5800 RPM)
CPU Temp @ 20 minutes into test - 106 (fans at 6200 RPM)
CPU Temp @ 25 minutes into test - 108 (fans at 6200 RPM)
For thoroughness, I also opted to run the test on a brand new 13" MacBook Pro, a 2 year old white MacBook 2.2GHz and another MacBook Aluminum. It's convenience I have when surrounded by 5600+ Macs across campus. All of the other machines also reported similar numbers, breaking the 100 degree threshold between 12-13 minutes into the test.
While I do not wish to discredit that URL, in all honesty I've probably had three times the number of entries on that website (611 as of this post) come across my desk in the past year for various reasons. So I really can't see that as being a valid resource to support an argument.
Not to mention it was your decision to not purchase AppleCare on your computer within the one year window, it was also your decision to not properly ensure adequate function of your machine prior to conclusion of the one year limited warranty. There was no responsibility on behalf of Apple to obligate you to stress test the machine 4 months after the one year warranty expired.
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Link to picture
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Macbook CPU throttling under full load, average temperature.

I would like to know 2 things:
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While I'm aware of certain benefits to lowering CPUclock to save battery power and avoid hardware failure at extreme ambient temperatures, I dont belive this is the case at hand. I paid for a 2Ghz laptop, not 1.67. I want my 2Ghz when I need it; under full load.

Download CoreDuo Temp at http://macbricol.free.fr/coreduotemp/
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Thank you for visiting Apple Support Communities.
There are a couple options available to you to transfer purchased media to your computer. Below, I have included a couple articles that outline this process.
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Message Edited by imotall on 02-Jan-2010 11:29 PM

JBenchmark ACE shall help u in diagnosting ure CPU speed. Please make sureure on the latest firmware on ure device, as in my case for Nokia 5800XM, the old firmware before v21 enables only 192MHz and below.
JBenchmark ARM CPU estimator gauges the generation of processor and clock frequency of mobile phones with unique Java-based software.
Checking on my Nokia 5800XM ARM11 CPU Speed result as below:
Register an account here: [URL=http://www.jbenchmark.com/registration.jsp]http://www.jbenchmark.com/registration.jsp[/URL]
Login here: [URL=http://www.jbenchmark.com/login.jsp]http://www.jbenchmark.com/login.jsp[/URL]
Download:
- [URL=http://wap.jbenchmark.com/ace/ACE.jar]http://wap.jbenchmark.com/ace/ACE.jar[/URL]
- [URL=http://wap.jbenchmark.com/ace/ACE.jad]http://wap.jbenchmark.com/ace/ACE.jad[/URL]
Upload your result for calculation to JBenchmark server itself !
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I'm an Xploit - Please feel free to post your issues, feedbacks in this discussion forum and I'll do my level best to help, otherwise my knowledged friends whom are around willing to help you. Thank you !

CPU only clocks up to 1.2GHz on full load

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