Interesting observation with laptop fans and voltage allocation

[stagnationpoint]

I recently picked up a new ThinkPad P16 and have been comparing it to my older P17. I ran R23 alternating different cooling methods as follows:

1.) Default fan curve
2.) Fan curve I have used over the years in TPFanControl
3.) Set TPFanControl to leave fan at 0 regardless of temperature.

When I use the default fan curve, or my curve in TPFanControl, I consistently run single runs at 22500. However, when utilizing an IETS external fan source, powered independently of the laptop, I consistently bump up to 22800-22900. I was surprised at how much power allocation that fans apparently have and the voltage the regulator is allocating for them. I am almost certain, first run in the morning prior to using my laptop, I may very well breach 23K, which is pretty insane for a laptop.

This makes me wonder if desktop users were to power their case fans independent of the PSU inside the case, what their scores may look like. Whether they left it like that, or tried it just to see the potential of their setup.

If this catches ones interest, I would be very interested in hearing feedback on your findings.

 

[Bill_Bright]

I am not in a position to try on my PCs but I don't see how it would matter.

It is important to note that power conservation and heat management are MUCH MORE critical on laptops. PC PSUs do not have to charge a big battery while running the computer at the same time, for example. There are no heat sensitive charging circuits in a PC. And cavernous PC cases provide, in comparison, massive amounts of cool air flowing through the case.

Its comparing apples to oranges.