AMD thermal throttling

[PlaidJello]

I'm getting conflicting information, so I'm here to ask the resident experts. If a CPU fan dies on an A64, does it throttle down, turn itself off, or what?

A related question is: Let's say I don't use the stock CPU fan in favor of an XP-120 with a Panaflo that does not support RPM monitoring, and the fan dies. What happens?

Does the motherboard monitor the RPMs of the fan and, in the case of death, shut the system down? Or is it handled at the processor level? Thanks

 

[Woofer00]

I'm getting conflicting information, so I'm here to ask the resident experts. If a CPU fan dies on an A64, does it throttle down, turn itself off, or what?

A related question is: Let's say I don't use the stock CPU fan in favor of an XP-120 with a Panaflo that does not support RPM monitoring, and the fan dies. What happens?

Does the motherboard monitor the RPMs of the fan and, in the case of death, shut the system down? Or is it handled at the processor level? Thanks

Throttling of any sort only happens when the load on the chip gets reduced - you won't be seeing this happen in your case. What WILL happen is that the processor overheating protection will kick in and hopefully turn off your machine before your chip becomes overheated. I say hopefully because it's possible it won't detect in time due to a faulty temp sensor. Also, RPM monitoring shouldn't matter too much. It certainly doesn't hurt, but it's not going to make the computer unbootable.

Bottom line - don't let the fan stop spinning. If the A64's on-die temp sensor decides your proc is too hot, it'll just shut it down automatically - do this a couple times while windows is booting and you'll have a nice and corrupt installation.

 

[PoW]

On an old 1700+xp i discovered this shutdown mech doesn't work to well after repeated attempts at startup. The system will usually stay on for a second or less then it will shut down. If you keep trying to start it up (like i stupidly did) after 20 or so attempts a wonderful expensive ploom of smoke will hit you in the face. What fun...

 

[Loto_Bak]

the xp models did not have on die temp sensors... AMD made it required for mb manufacterers to include a 'high temp turn off' system. This usually uses a termal diode underneith the cpu socket.

As with anything parts can fail... though I've never heard of a on-die thermal diode failing I suppose it is possible

 

[Tazman2]

On an old 1700+xp i discovered this shutdown mech doesn't work to well after repeated attempts at startup. The system will usually stay on for a second or less then it will shut down. If you keep trying to start it up (like i stupidly did) after 20 or so attempts a wonderful expensive ploom of smoke will hit you in the face. What fun...

I'm pretty sure the mechanism has changed ALOT since the 1700+ days!

 

[Dekar12]

There is a setting in the bios.

When the cpu reaches a certain temp it will turn off the machine.
In my case I have it set at 70C well below the rated 85C of the chip. Because lets face it, if my chip has hit 70C, something is going wrong and better start the shut down process now before it does real damage to the chip.

 

[(cf)Eclipse]

There is a setting in the bios.

depends on the board. they should all have auto-shutdown, but this doesn't mean they're all adjustable.
i know on my k8n neo, there's a locked option that's hidden in the bios to change what the temperature is, but without modding the bios, it's set to 70ºc.

 

[Jasonx82]

LOL I fried my 1900XP because i was to lazy to clamp it on and just thought holding my fingers on the corners of the heatsink would do the trick. Boy was i Wrong..

And Also I had my brand new 2700XP Retail Chip which was sitting there next to me (2800XP was fastest available at the time) I paid 500 including tax !!!

On an old 1700+xp i discovered this shutdown mech doesn't work to well after repeated attempts at startup. The system will usually stay on for a second or less then it will shut down. If you keep trying to start it up (like i stupidly did) after 20 or so attempts a wonderful expensive ploom of smoke will hit you in the face. What fun...

 

[Tazman2]

LOL I fried my 1900XP because i was to lazy to clamp it on and just thought holding my fingers on the corners of the heatsink would do the trick. Boy was i Wrong..

Silly kids!