Question about ASUS VIA 694XDP Dual Processor Chipset CUV4X-D Motherboard

1 Answer

Processor speed discrepancy

Greetings. I am having an itermittent issue during power-up, which is becoming more frequent. After the memory test of the POST, my motherboard stops after the following lines:

Award Plug And Play BIOS Extension V1.0A
Initialize Plug And Play Cards...

The system freezes here and requires a hard reboot. During the next POST, the CPU speeds listed have dropped from the original 866 Mhz to 433 Mhz. The system automatically initiates the Setup function, has the 866 Mhz listed as the CPU speed and indicates in the description section to the right that there was a discrepancy in the CPU speed during boot-up. I save the 866 Mhz CPU speed in the BIOS, reboot and the process starts all over again. I am thinking that one of the processors is sick, but I am not sure. I originally thought that it may be heat-related so I power the unit off and allowed it to cool for 24 hrs with no change in the status. I am currently running BIOS Rev 1016 on my motherboard. Any insight would be greatly appreciated.

Regards,
Dan

Posted by on

  • Dan Bender
    Dan Bender Jun 01, 2008

    Thanx for the feedback. I did a physical check and did not see any capacitors that appeared "mis-shapen" in any way. Nor did I notice any evidence of a "leak" trail around any of the caps, as I would have expected in this condition. I qualify this by saying that I only checked the top surface, as I have not removed the motherboard from the case. I will continue to investigate more thoroughly. In the mean time, if you think of anything else I would love to hear more possibilities.



    Best Regards,

    Dan

  • Dan Bender
    Dan Bender Jun 02, 2008

    Greetings again. I performed a more intensive inspection of the motherboard and did not see any indication of a capacitor leak. I decided to try pulling the PCI boards individually to see if one of them might be pulling down the PCI bus. Once I pulled the D-Link DFB-A5 USB/FireWire card, the system booted with no errors. Just as a verification, I re-installed the D-Link card to see if it would fail. Surprisingly, the whole system booted with no problems. I am still suspicious of the D-Link card, but I will have to do some more experimenting with it. Thank you for all your input.

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  • 45 Answers

Hey, I think you have bad capacitors. Check for buldges on the capacitors.They might of overheated beside the motherboard.You should fix it right now while you still have a chance.

Posted on Jun 01, 2008

  • Bobby L
    Bobby L Jun 02, 2008

    Check the bottom side, some capacitors buldge from the bottom.
    Did you try clearning the CMOS and taking out the battery?


  • Bobby L
    Bobby L Jun 02, 2008

    You might of not pushed down the card well enough. Thats sometimes causes your comptuer to not boot at all or even fry the card. Luckly your comptuer isn't blown.

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A dual core processor has two cores (essentially, two CPUs on one chip). Core2Duo is a specific dual-core processor design. Thus, all Core2Duo CPUs are dual-core CPUs, but not all Intel dual-core CPUs are Core2Duo designs.

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It all depends on two things;

1) That you can go into BIOS Setup, and change parameters.

Parameters such as;

A) The Front Side Bus speed. (FSB), or
B) The Voltage for the CPU (Processor), or
C) The Multiplier for the CPU (Processor)

Or there may be a Soft CPU option available for the above, in BIOS Setup.

Be aware that overclocking the Processor will also step up the FSB. Ram memory, and expansion slot devices, will cease to work if the FSB is too high. (Front Side Bus,

http://en.wikipedia.org/wiki/Front-side_bus

408MegaHertz to 1008MegaHertz?

That's a big jump. I do not think that processor in this technology age, is capable of overclocking this far. Plus IF it does, will not continue.

http://en.wikipedia.org/wiki/List_of_Intel_microprocessors

Heat will be a Big issue for one.
The pathways inside a processor are based on the nm architecture.
NanoMeter. 1 Billionth of a Meter.

[ Your processor was probably in the 250nm architecture technology. Today's processors are down to the 22nm architecture ]

With too much heat there is Electron Migration. The electrons jump off, or Migrate, from the circuit trace they are on, over to a wrong circuit trace.
Causes the processor to burn up.

Secondly there is also a limit on the performance of a Processor. Asking for almost 2 and a half times the factory setting, is asking for too much.

Plus the Processors are tested at the factory, and sent out. They only have to fall within a rather broad set of specifications, and can be considered okay for the consumer, or computer manufacturer.

The Processor you have may have been on the Bottom of the test range. Even if you have knowledge, of someone else getting this kind of performance out of the same model, it may be that theirs was one of the ones, on the Top of the test range.

Overclocking is done in SMALL increments, THEN tested to see if the computer works fine, over a 24 hour period.

PERIOD

Change the Voltage?
Change in no more than a .2 Volt increment. Then the 24 hour test. Everything's OK? Move up .2 Volts. 24 hour test.

Remember, Ram Memory operates at approximately Half, of the Processor's FSB.
The expansion slots are a lot lower.

Change values (Parameters), such as Voltage for the CPU (Processor) for one, and you change everything.
Too much, Ram Memory, and anything in an expansion slot, will not work.

What Processor is it?
What motherboard name and model number? (Or what computer manufacturer and model number )

Post back in a Comment.

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The 'Caps' located around the processor, are Voltage Regulators for the processor. These 'Caps' are critical.
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