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PIII 600 EB HTPC suddenly 450 MHz only  

post #1 of 9
Thread Starter 
Disclaimer: I'm not familiar with your particular motherboard and it's features.

Having said that, many motherboard BIOS's are designed to allow the PC to start at a safe lower frequency and reduced voltage, then read values from the CPU and self-configure the values for front-side bus and core voltages. This does not appear to be working in your case. Since you have already re-socketed the CPU, I suspect your motherboard has suffered a component failure - perhaps a voltage regulator. I suggest you replace the motherboard - the cost of a new one is so low that they usually do not get repaired.

Gary
post #2 of 9
Gary,
thanks for the hint. I do not see any slot1 motherboards advertised any more so I fear it is quite difficult to get an replacement quickly. I also fear that I therefore have to replace both the processor and the mainboard. http://www.avsforum.com/ubb/frown.gif
How high do you think is my risk to damage the processor running it under the condition right now? It has been running like that for couple of days now.

Thanks

Christoph
post #3 of 9
Just to clarify: are you saying that this system worked before, and suddenly stopped working? Did you change anything (HW or SW) before it happened?

Before you scrap the motherboard, I'd try loading BIOS defaults and such, maybe even flashing the BIOS. Occasionally programs will change something in the BIOS that's not even a visible option. I remember a note in the errata for my mobo that said that a particular program was known to cause the CPU fan to turn off(!) when it was installed/run.

------------------
No boom today. Boom tomorrow. There's always a boom tomorrow. -Ivanova, B5
post #4 of 9
dcheesi,

actually the system is still working, just at a lower CPU clock speed. It may not be feasible to flash the BIOS in case the motherboard has a hardware fault like Gary suspected, right?
I am not sure, but maybe the whole thing happened when I was trying out dscaler 2.3 beta http://www.avsforum.com/ubb/frown.gif

Christoph
post #5 of 9
I guess my point is, if you're going to throw out the motherboard anyway, you might as well try everything first. Normally flashing the BIOS is a last resort, since it can result in an unusable board; but if you suspect your board is unusable anyway, why not try it?

Of course, if you're going to just keep the board and run it as is, then you may not want to try anything dangerous. A slow, flaky board is still better than nothing at all.


------------------
No boom today. Boom tomorrow. There's always a boom tomorrow. -Ivanova, B5

[This message has been edited by dcheesi (edited 05-25-2001).]
post #6 of 9
Hi Christoph:

___You are stuck with a rather buggy Intel I820 chipset board. Intel recalled all of the I820 chipsets with the MTH installed because of instability when using SDRAM in them. Asus unfortunately decided not to take this route and instead wrote up a statement about they do not see the problem and will continue to manufacture … Later on in the year, they stopped manufacturing this board altogether and restated their intentions to cover this boards problems. They are now offering some kind of compensation (probably a few free sticks of cheap RDRAM which I highly recommend that you sell and use the proceeds and move away form this board altogether). As for running at 450 MHz, that is fine. All you are doing is running the FSB at 100 instead of 133 and you should be able to change this to 133 MHz FSB again for 600 MHz operation in the BIOS itself. Leave the CPU multiplier at 4.5 and adjust your FSB back to 133 MHz. As far as BIOS flashes, there have been a few for the 2000 series BIOS’ posted on the ASUS web site. I am not going to tell you to flash your BIOS to an updated one but I watch the early adopters of a particular BIOS in the tech pages as well as flash my own HTPC’s with them first and if they appear stable, all other builds get the update as well. An upgraded BIOS/firmware can cure all kinds of problems that may not be explicitly listed in the readme.

___Please consider contacting ASUS in regards to the compensation if any for more information on your board if you want to go this route.

___Good Luck

___Wayne R. Gerdes
___Hunt Club Farms Landscaping Ltd.
___ xcel@midwest.idsonline.com

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New E-Mail address for the time being ... waynegerdes@earthlink.net

[This message has been edited by xcel (edited 05-25-2001).]
post #7 of 9
Thanks dcheesi and xcel for the advice, I guess I have to sleep over the decision whether I try to flash the BIOS. The system seems to be not unusable at all and I may be able to have another PC that I can use for HT in the near future and then look deeper into the problems with this mainboard.

Cheers

Christoph
post #8 of 9
Hi Christoph:

___This may help you decide: Asus Statements on Intel’s MTH issue (May 10, 2000) .

___Good Luck

___Wayne R. Gerdes
___Hunt Club Farms Landscaping Ltd.
___ xcel@midwest.idsonline.com

------------------
New E-Mail address for the time being ... waynegerdes@earthlink.net
post #9 of 9
Hi everybody,

I have a strange problem concerning my Asus P3C2000 PIII/600 EB HTPC which keeps stopping at the BIOS (Award) Dialog telling me that there is something wrong with the internal cpu frequency. However, I can start up at 450MHz/100 (option in the BIOS) and the machine seems to be running stable there. The machine would not come up any more at its native internal speed of 600MHz/133.
A utility called MBProbe shows me a faulty value at Vccp2 (?), i.e. 2.53 V, Vccp1 is measured as 1.65V. Processor temperature seems to be normal. I am no hardware expert, so I really don't know what the two different values mean (are there two different power sources for the processor?).
I also tried to remove the processor carefully and put it back again, no luck (could have been a bad contact).
I swapped the RAM (128) from another computer, no difference.
I tried to find help in several hardware and mainboard newsgroups, but no luck so far.
Any ideas hints would be greatly appreciated.

Thanks

Christoph
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