Grim

Here's a question for you guys. Its about a theory sorrounding the 3 pin outlets on most MOBO's for fans.


- a couple of fellows over at this other forum I used to hang out on - claimed to bear consistent testimonies of the following:

That when the average CASE FAN, is connected to the average Mobo's 3 pin power connector, OVER TIME, these outlets become dead (i.e - they dont give out power anymore).

One theory as I recall them as saying - is that the resistors, (though I doubt resistors would be needed for the said!) after a while, - because the Current/voltage draw of the case fans are more than one the connectors output- DIE, and with them - the power output.

I've personally never seen it - but I've never really used the "chassis" fan connector for a case fan.


BUT - here's the thing - all the propriety PC makers such as dell and compact, actually use THOSE connectors, to power the case fans of their PCs.
The main purpose behind that evidently - so that when temperature sensor of the mobo/CPU , report high/low temperatures, the speed of the respective fans can be adjusted accordingly.

What do you figure?
Those mobo's used in the said PCs have higher outputs at the 3-pin headers?
or
The theory is garbage?

(I'd personally like to uttilize them myself - I may go about some.. testing.. )
(I also wonder if i could boost (if necessary - their outputs. The only obstacle I foresee - is the current flowing back into alternate sub-circuits of the mobo (which would definatly happen, if they're no resistors present - WHICH, one could understand seeing that under normal circumstances, they wouldnt be needed.)- but anywho - thats another matter.
What do you guys think about the main argument?

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gonX

It's actually very known and true. I ran an Antec TriCool (which I think is 7w on full load, a bit below the max of those headers), and one of the TRIMMERS exploded and shut down my rig (which was quite annoying because I wrote a pretty long essay in Danish, though that got me used to CTRL+S a bit more )

TL;DR, it's true and has happened to me.

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Grim

hmm! - I see gonx (thanks for the reply ^_^)


So - thats one bearing the same testimony...

( does make sense though, except, that I WOULD THINK, that the darn manufacturers would allow for the current draw to be more variable :[)

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