CPU speed settings

April 9, 2009 at 08:45:34
Specs: Windows XP, 768
im having real problems with my CPU speed. my motherboard is ASUS P4PE-X.The problem that I've encountered has something to do with the CPU frequency multiple.In the default setting, it is just 13x, however, it suddenly became 26x. Every time I use my PC, after several hours of using it, it will eventually shut down. when I re-open it, the the Advanced Menu in the setup program prompted that I have wrong settings in my CPU speed. I wanted to change the Frequency multiple back to 13x but there's no available options because my proocessor is locked. Also, according to the manual, I can only change the settings if I'm in the jumperfree mode (I dunno anything about this one, I believe its one of the feature of the motherboard). Im having difficult times using my PC right now. Can somebody please help me coz I hate to go to technicians who cant come up with a feasible solution other that reformatting the system?

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April 9, 2009 at 09:21:11
"....reformatting the system?"

Your problem has got absolutely nothing to do with Windows.

What cpu model are you trying to use?
What ram do you have installed?
If you mix speeds of ram, the max speed the mboard bios can automatically run the ram at is the speed of the SLOWEST of the all modules installed.

Is this the same mboard as in your other Topic?

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April 9, 2009 at 21:10:26
Thank you for reply! After some research, I've found out that my motherboard should have been in jumperfree mode default. however, I still cant change the multiplier. I really dont know what's the problem because even if I put the CPU Speed to "manual" it is still have problems. My current setting is "manual"(internal) 26x (multiplier) and 100 for external freq. What's the problem with that?

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April 10, 2009 at 10:44:53
What cpu speed and model are you trying to use?

What sizes of ram modules do you have installed?

What types of ram do you have installed? - PC1600 (200mhz), PC2100 (266mhz), PC2700 (333mz), or PC3200 (400mhz)?

Are the ram modules single sided (chips only on one side) or double sided (chips on both sides)?

Which of the three ram slots do you have which ram module installed in, slot one being the one closest to the center of the mboard?


I took a look at the Asus manual for your model.

In the bios Setup.....

Advanced -
CPU Speed - default is Manual?
"When the motherboard is set to JumperFree mode, this field allows you to select the internal frequency of the CPU."

In that manual I do not see any jumpers on the motherboard for enabling/disabling JumperFree mode.
Since Asus doesn't normally omit information about that, I assume there are no such jumpers on this mboard and you can select CPU speed - JumperFree mode instead of Manual.

If you select JumperFree mode and you STILL get messages you have the wrong settings for your CPU speed, the cpu is running overall slower than it was designed to - the only thing that can cause that is either
- all of the ram modules you have installed, or at least one of the ram modules you have installed, DO/DOES NOT support the fsb speed requirement of the cpu you are using. The max the bios automatically runs the ram at is at the SLOWEST specs of all the ram installed.
- you have some other setting(s) wrong in the bios Setup

The manual says something along the lines of if the multiplier is locked on the cpu itself, in this case to X13, you can't change that in the bios Setup, at least you can't and have it actually "stick" when you Save bios settings.

"My current setting is "manual"(internal) 26x (multiplier) and 100 for external freq."

You mat be able to select X26 in Manual mode, or other settingsthat are wrong, but the setting won't "stick" - be retained - when you Save bios settings if the cpu multiplier is locked on the cpu itself, and/or if settings aren't appropriate for the ram you have installed, and/or aren't appropriate because of other settings in the bios Setup.

"...100 for external freq "

The manual doesn't mention what your other choices are.
are they 133, 166, and 200mhz?

Bios Setup settings can be confusing.
e.g. PC1600 (200mhz) ram uses 100mhz externally but because it's DDR ram it's data rate is doubled and in effect the ram itself runs at 200mhz
The max fsb speed available to the cpu is double the DDR ram speed.
The multipler figure is usually what you multiply the external mhz the ram is actually running at (at least it is on my older Asus A7V600), or the lesser mhz the bios is set to otherwise that the installed ram supports, to arrive at the overall cpu speed.
E.g. on this mboard 13X 100 (1.3ghz overall), or 13X 133 (1.7ghz overall), or 13X 166 (2.1ghzoverall) , or 13X 200 (2.6ghz overall).

PC1600 ram or faster can be used with a cpu that requires a 400 mhz fsb speed, but PC1600 ram can't properly support a cpu that has a 533 mhz fsb requirement, the max fsb speed would be 400mhz, and the cpu would run slower than it was designed to run at - at 75% of it's speed.

On this mboard you can't use a cpu that has a 800mhz fsb requirement unless all the ram is PC3200 (400mhz) ram, and you can't use PC3200 (400mhz) ram, or at least you can't have it run at 400mhz, unless the cpu that has a 800mhz fsb requirement .

Apparently your mboard has 3 ram slots, each slot can support up to and inc. a 1gb module, BUT
- the total max amount that can be supported is 2gb
- you can only use PC3200 (400mhz) ram on this mboard if the cpu uses an 800mhz fsb speed (, or , at least, you can only have it run at 400mhz if a 800 mh fsb cpu is installed).
- the first slot can use either single or double sided modules, but the other 2 slots can only use a double sided module in slot 2, no ram in slot 3, or a single sided module in either of or both of slots 2 and 3
- ram modules with 16 bit chips are not supported by this mboard

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Related Solutions

April 12, 2009 at 06:07:11
my ram form is DIMM and memory type is DRAM. my RAM is 768.

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April 12, 2009 at 10:51:30
You have not answered most of my questions.

"my ram form is DIMM and memory type is DRAM"

That's useless information.
All mboard ram has been DIMM ram, since the late 90's, and DIMM ram was used as well as SIMM ram before that.
All mboard ram is Dram.
What you actually have is DDR SDram (Double Data Rate Synchronous Dynamic random? access memory), but I already knew that.

"my RAM is 768"

That only tells me you have 768mb of ram, total, being detected by the mboard.
Since your mboard can only use 64mb, 128mb, 256mb, 512mb, or 1 gb (1024mb) modules,
you may have 2 modules - 512mb and 256mb
or you may have 3 modules, each 256mb,
or you may have one or more larger modules that are not being detected correctly.

Open up your case.
How many memory modules are there installed?
Two or three?

Go here and download CPU-Z:

Extract the files and run it.

Post the results here of these things:

On the CPU page
- Processor name
- Specification
- Core Speed
- Multiplier
- Bus Speed
- Rated FSB

On the Memory page
- Size -
- DRAM frequency

Those are not necessarily the same as the total of or the max capacities of the ram modules.

Size is the total amount of ram that's installed in the mboard that's being detected by the mboard - if you have installed the wrong type of ram in any of the physical slots, that may not be the same as the total of the capacties of the ram modules.

DRAM frequency is the speed at which the mboard is presently running all the ram. The mboard always, at maximum, runs all the ram modules at the slowest specs of all those installed, if the specs are different, and that frequency can also be be less than the maximum if bios settings are set that way.

On the SPD page
Memory Slot Selection
for each Slot #, 1 to whatever number

- which slot numbers list ram

- for each slot number that lists ram
Module size
Max Bandwidth
Frequency - the highest mhz number

NOTE that the number of slots listed is not necessarily the same as the physical slots you have on the mboard, which is three.
Each Slot # listing is actually a memory bank supported by your main chipset's memory controller.

You may have 4 slot # listings in your case -
2 for the first physical slot, the one closest to the center of the mboard, and one each for each of the other two physical slots.
Or you may have more because they are supported by the main chipset, but of course if you don't have the extra physical slots they would have no ram found installed.

E.g. for my old Via MVP3 chipset mboard, CPU-Z shows 6 Slot # listings, yet I have three physical slots on the mboard.
Each physical slot has two memory banks.
If a single sided module is installed in a physical slot, only one of the two Slot # listings in CPU-Z for that slot shows a module size.
If a double sided module is installed in a physical slot, both of the two Slot # listings in CPU-Z for that slot shows a module size, each half of the total module capacity.

In some cases, the number of physical ram slots on the mboard is less than what the memory controller supports.

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April 26, 2009 at 07:05:50
hi thanks for the info tube. i really has a hard time understanding all of this. Until now, I can open my PC, however after several hours it will suddenly shut down. Anyway, here's some of the info about my PC that I hope could help you..

Center Processor:

CPU name: Intel(R) Pentium(R) 4 CPU 2.60GHz
Current clock speed: 2606GHz
Max Clock Speed: 2606
Voltage: 1.5V
External Clock: 100Mhz


Model: P4PE - X

Memory Device:

Total Memory: 767 Mb
Used Memory: 443 Mb
Device Location: DIMM 2
Capacity: 256 Mb
Speed: NullMhz

i only have two modules anyway, 512 and 256.

i hope these help

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