How much time do you get to close a system when CPU fan fail?

MaxAlbatross · Oct 3, 2014

Hi

I made a mistake while tweaking with speedfan. The fans, suddenly stopped and I managed to save the CPU by closing speedfan (fans goes to 100% when speedfan is closed).

This made me uneasy and curious.

How much time do you actually get to shutdown your system or restart the fans when it fails???

I restarted the fans after 5-10 seconds! Was I close to completely destroying my system or I had more seconds before it failed?

Just want your thoughts and experiences on this issue.

Someone Somewhere · Oct 3, 2014

Depends on what you're doing with the system, what the components are, and what the heatsink is. If it was idle with a modern chip and large cooler, you could probably use it indefinitely - passive systems exist.

Most CPUs have automatic thermal throttling that should save them.

Spectre694 · Oct 3, 2014

With the heatsink still attached there should be enough airflow in your case to at least keep the CPU below any sort of damage especially once it started thermal throttling.

That said though I wouldn't make a habit of running it without a fan though I think for a few seconds once no damage should be done.

MaxAlbatross · Oct 3, 2014

I had the stock AMD cooler on the FX-8350 (now I have NH-U12S though so it wouldn't be a problem today)

From speed fan, temps reading reached 65 degrees C after a couple of seconds and stayed at this temp for 5 more seconds after I restarted the fan.

The only software running was my antivirus on the background.

I know for a fact that Max core temps on FX-8350 is 61 C so I was scared but everything ran smoothly after. I know that my system throttled though since my Antivirus froze for a couple seconds.

Does anyone know if this 61 C max temp is a recommendation by AMD to keep the CPU life longer or an actual threshold where the CPU will die?

I hope nothing is damaged, but that's what you get when you're a noob and click on things youre not supposed to.

oxiide · Oct 3, 2014

MaxAlbatross :

Even discounting the fact that a modern CPU would clock itself down to reduce temperatures (possibly even just shut itself down if necessary) you aren't likely to permanently harm a CPU by a big, quick temperature spike. Damage generally occurs by running the chip too hot over sustained time periods. Possibly months or even years, and then it will typically die gradually.

AMD's quoted temperature specs seem unbelievably and confusingly low to me, but I have a really hard time believing 65°C is even remotely dangerous. The 8350 is the same silicon as an FX-9590, and good luck keeping that below 61°C.

MaxAlbatross · Oct 5, 2014

Alright

Thank you for your answers! I don't think I damaged anything then since everything is running fine.

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