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by crote 841 days ago
There are, you can override your fan speed from the OS. But that leads to issues with a control software crash potentially leaving your fans stuck in a low-speed state.

There's pretty much a 1:1 link between CPU load and CPU temperature, so relying on temperature probes is good enough for almost all situations.
3 comments
joshspankit 841 days ago
> There are, you can override your fan speed from the OS. But that leads to issues with a control software crash potentially leaving your fans stuck in a low-speed state.

That’s why I didn’t talk about user software and was focusing more on mobo (since it knows the current state of all usage and is not os-dependent) or low-level OS hooks which can have battle-tested processes to make sure that the fans are not left uncontrolled. I appreciate you bringing up the point though, it’s vital to make sure the chips don’t fry.

> There's pretty much a 1:1 link between CPU load and CPU temperature

Yes agreed, but there’s a lag time between the two

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semi 841 days ago
I don't think you can fry a modern chip, at least without really going out of your way to.

But even if you just forced all of your fans to run at 0% (or physically removed them) I would expect the CPU to trigger PROCHOT and throttle it's performance, hard crashing if it has to.

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KMag 841 days ago
Honestly, the fan should ramp up to maximum speed if not explicitly set within the past 500 ms or something, and also have a high-water mark temperature that if crossed while the fan isn't at maximum speed causes the fan to run at maximum speed until the machine restarts.

If the OS can't keep up with the fan speed update schedule, go into your failsafe mode.

If you cross that maximum temperature while being commanded by the OS to run at maximum speed, then that's presumably not an OS bug. If otherwise, treat it as an OS bug and put the OS back into diapers, to re-try the big kid underwear on the next restart.

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dvdkon 841 days ago
I don't know about any standards, just about software that tries to support as many proprietary interfaces as possible (and doesn't have support for plenty of hardware). Have I missed something?
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