Originally Posted by Tsumi
Are you trying to ask if there's any difference in cooling between manually controlling your fans, and using the PWM method?
I think PWM would be slower to ramp up the fan speeds, but once it's at max, it won't be any different. So basically, you will have less cooling capacity initially, but once it hits the temp limit, then it will be the same.
Kind of close....I know what I want to ask but the word's won't come lol.
Thought it would be simple lol:) thank you for trying. I understand what you mean.
I'm not worried how long it will take the fans to respond to the signal, more how long it will take the water to respond to the added airflow across the radiator's.
I'm going to pull these numbers out of my @$$ just for shiggle's.
We have a hypothetical loop with imaginary fans, radiators and blocks so take these numbers with a massive pile of salt
Lets say our room is 25c ambient temp and our hypothetical loop is running non pwm fans at 1500 RPM. Lets say our CPU Idles at 5c above room temp( 30c) and the water in said loop equalize's at 27c when at idle.
Now lets say when we add load to the CPU that the temp jump's to 60c(35 delta over ambient) the water in the loop will have to equalize to a new temp before the CPU temps even out.
Its that equalization that is throwing me for a loop with the PWM fans. if we changed to PWM fans common sense would tell us that the water in the loop will have a higher delta, and the CPU will be a little warmer but its idle temps who care's. I want to know if the fact that the water loop has to equalize will add a wonky affect to PWM fans.
With my Air cooler the fans are set up in a PWM config and they ramp up as CPU heat sup(i know...duh! lol) however with air cooling the added airflow from the PWM fans is almost instant, with in a second the temps react to the fan speed being changed.
I know that with my friends CLC(H50) and uber high speed fans(ap-31's) if we turn the fans down low and turn on prime and let is sit for about 5-10 min the temps get nice and warm. if we crank the AP-31's on it to full power it take's a good 2-3 min for the temps to stop jumping and even out. 2-3 min on a CLC! A custom loop will have at least twice the water or more, how long will it take for the temps to equalize in an average loop? 5-6min? longer? will the fact that the larger radiator's over the CLC play a part in the loop temps equalizing faster? or will it sill take a long while? if so that would destroy the reason for using PWM, as while surfing the net or doing minor tasking the CPU wont be under load long enough for the small spike's in fan speed via PWM to actually affect the loop temps. Meaning the fans ramp up and down and do all kinds of spiffy things but the temps don't actually change... Sorry for the very long post lol. But that should narrow down. sorry I have no idea why the English language is failing me right now lol Thank you so much for you patience! rep has been handed out.