ASUS A7V600-F - dumb CPU overheating protection

[Behemot]

It's measuring some totally not possible temperatures making it shut down before POSTing with small cooler. Besides I had some nerves flashing it (Fujitsu-Siemens OEM), there is latest beta BIOS now. No change.

The reason for this seems to be simply ASUS (OMFG when this sucker company will finally die in pain?). But, is there a way I can repair it? There does not seem to be ANY probe for measuring so I don't understand where the crap reads it from. Nothing about overheat protection in BIOS.

There are also almost all caps bad - not optically, but it's OST so who knows. Do you think pre-caution recap may help?

[Th3_uN1Qu3]

Re: ASUS A7V600-F - dumb CPU overheating protection

Not sure if recapping would help... These things read directly from the CPU, if the monitoring IC or surrounding components are bad, it won't change much.

[yyonline]

Re: ASUS A7V600-F - dumb CPU overheating protection

That's a KT600 chipset board. Was a pretty reliable chipset overall, if I recall.

The newer Athlon XPs have an internal temperature sensor. Have you tried a different CPU?

[PCBONEZ]

Re: ASUS A7V600-F - dumb CPU overheating protection

A recap might help. Hard to say.

Is pinned CPU so maybe bad connection on some pins.
Remove and replace CPU from ZIF socket a few times to make good connection.

Small caps could also be the problem by making the reference voltage to the temp sensor wrong.
Small OST 4 & 5 mm have been seen to screw up Vtt to a chipset before [on an Asus board as I recall] and screwing up a small reference voltage isn't different.
-
For that matter any brand of small cap could cause such a problem.
Happens when 85C caps are used now and then.
It's just that OST is the only brand I recall seeing it with 105C rated caps - thus far..

Also:
The idea that only big caps fail wasn't ever true, it is just most common.
The older a board gets the more likely the small caps are to dry-out and go fubar.
.

[brethin]

Re: ASUS A7V600-F - dumb CPU overheating protection

A small cooler and a AMD CPU = bad idea. Get a good heatsink/fan and try it. It would also help to say what CPU you are using and what temperatures you are reaching and where you are reading them from. Blame ASUS if you want but they dont claim to make idiot proof boards.

[PCBONEZ]

Re: ASUS A7V600-F - dumb CPU overheating protection

Blame ASUS if you want but they dont claim to make idiot proof boards.

That's the only claim they live up to.
.

[Behemot]

Re: ASUS A7V600-F - dumb CPU overheating protection

A small cooler and a AMD CPU = bad idea. Get a good heatsink/fan and try it. It would also help to say what CPU you are using and what temperatures you are reaching and where you are reading them from. Blame ASUS if you want but they dont claim to make idiot proof boards.

These CPUs are built to handle temperatures arround 70 °C quite well. I never had problem running any other motherboard with any other CPU using small cooler I have, for testing purposes. Just this ASUS.

What if I used the biggest cooler I have (one of the biggest which was made for Socket 462) and under heavy load in not so well cooled tower it would just shut down because of some dumb protection decides it is overheating? It was reading 70 degrees after half an hour with the big cooler. Although it was hot, it could not have such an temperature. I cannot guarantee somebody I will sell this board to won't do this, or in the worse case with smaller cooler.

It is not only this, there is more things why people designing ASUS boards shoudl get bullet instantly. I guess we are all familiar with ASUS strange polarity marking (as probably only manufacturer has changed polarity marking for caps). There is more stupidity liek this in ASUS. Not mentioning most unrepairable, dead boards I met is ASUS.

IIRC none of K7 processors had any temperature probe. But even if you are right and the later ones did, CPUs I tried are Palomino cores. So the board is just imagining these temperatures.

[c_hegge]

Re: ASUS A7V600-F - dumb CPU overheating protection

Blame ASUS if you want but they dont claim to make idiot proof boards.

I think that the idiot here is the board itself.

These CPUs are built to handle temperatures arround 70 °C quite well. I never had problem running any other motherboard with any other CPU using small cooler I have, for testing purposes. Just this ASUS.

My last AXP machine (with the ASUS A7V600-X motherboard) ran at 80-85°C under load. The heat sink was too hot to touch, but it didn't cook the chip.

[Sparkey55]

Re: ASUS A7V600-F - dumb CPU overheating protection

I think that the idiot here is the board itself.



My last AXP machine (with the ASUS A7V600-X motherboard) ran at 80-85°C under load. The heat sink was too hot to touch, but it didn't cook the chip.

A few hundred transistors here, a few hundred there; it will be slowly cooked over time eventually.

[Behemot]

Re: ASUS A7V600-F - dumb CPU overheating protection

No, Athlon XP is not Pentium 4, it is not suffering from thermal dead. I must admit that this temperature is really high, but 70 °C under load is still fine.

Off course I tend to have lower temperatures, but average user not and the CPUs are still running for him. I just want the same from this board because in the end some average Joe will be using the board.

[RJARRRPCGP]

Re: ASUS A7V600-F - dumb CPU overheating protection

I believe that all Athlon XPs have a thermal sensor.

The T-birds don't.

[PCBONEZ]

Re: ASUS A7V600-F - dumb CPU overheating protection

A Thermal Sensor is just a Thermistor. - Resistance changes with temp.
-
There is a voltage across it an a monitoring chip measures the voltage drop or the current through it and converts that to a temp.
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If the voltage is wrong so will be the temp reading.
-
Bad small caps can make the voltage to the thermistor wrong and/or screw up the voltages to the monitoring chip itself.
So can screwed SMD parts on the mobo, on the CPU, or in the socket.
-

Asus usually cheaps out on 'user undetectable' parts like those and similar parts for EMI suppression and so forth.
- Cheap and insufficient SMD parts.
- Cheaped down circuits at SMD level where people can't see or find it when it blows.
That is what is behind ASDS [Asus Sudden Death Syndrome] and ...
.. the ole Asus: "I can't find a single thing wrong but it just won't work".

~~
If you want to find out what the temp really is then modify a cooler so you can attach a known good thermistor to the CPU thermal plate and check it.
.

[kaboom]

Re: ASUS A7V600-F - dumb CPU overheating protection

Asus usually cheaps out on 'user undetectable' parts like those and similar parts for EMI suppression and so forth.

Like the lack of ESD protection for the USB ports. Which made ASS-US i865 boards known for 'mysteriously dying' USB ports...

Asus and PC-Chips, what's the difference? Not performance- price!

[pfrcom]

Re: ASUS A7V600-F - dumb CPU overheating protection

Hope I don't appear to be an Asus aficiando, because I'm not

I have several Asus boards, but only ever bought one new, a P2-99B which I found on clearance while looking for a Baby AT board

My quantity is probably due to their availability as used parts

With the disclaimer out of the way ....

I see the difference between Asus and PC Chips as Support

You -can- get manuals, BIOS code and drivers from Asus' site, although its performance is a P.I.T.A. (I usually use their FTP site)

With PC Chips your first issue is identifying what the product is, before hoping you get lucky on the PC Chips or ECS sites

[Th3_uN1Qu3]

Re: ASUS A7V600-F - dumb CPU overheating protection

I once had ECS give me THE WRONG BIOS on their site. I had to pay someone to get it reflashed to the proper one.

[c_hegge]

Re: ASUS A7V600-F - dumb CPU overheating protection

ECS
ASUS

[RJARRRPCGP]

Re: ASUS A7V600-F - dumb CPU overheating protection

I once had ECS give me THE WRONG BIOS on their site. I had to pay someone to get it reflashed to the proper one.

How did you know it was the wrong one? Could it have just been a corrupted file?

[Behemot]

Re: ASUS A7V600-F - dumb CPU overheating protection

Happenned to me recently too. There vere two marks of version on the board. Arround 5 revisions existed, from the three possible, one on the web had wrong color, one had no picture at all. First I picked up the wrong one, after reflash in different board it just does not take any keyboard input…

[Th3_uN1Qu3]

Re: ASUS A7V600-F - dumb CPU overheating protection

How did you know it was the wrong one?

The flasher utility warned me about it not being compatible. Since it came from the right place, i ignored the warning, and after reboot i was left with a dead board.