Dell gx280 + Bios Flashing Issue

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Okedokey said:
A diode wont make any difference whatsoever (apart from a very small voltage drop). Beacuse you haven't got any logic sensing the speed (as would be required by a clamp diode). You need to modify the resistance more signifcantly for a speed controller, which is what a potentiometer does.

Also just to confirm, you have gone to intel and updated everything there? because your screen lockups sound very much like chipset issues to me.
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...I believe it would as it has a "voltage ceiling" of xx volts to clamp and would allow all voltages up and to that ceiling to pass which will allow the fan to vary in speed if it needs to.
 
Da Mail Man said:
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...I believe it would as it has a "voltage ceiling" of xx volts to clamp and would allow all voltages up and to that ceiling to pass which will allow the fan to vary in speed if it needs to.
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I think you'll find that the circuit required to do this will be much much more a hassel than either a simple resistor or a pot.
 
So will a single resistor. A diode in series with a single resistor does nothing except control polarity, which since its DC is a non-issue. The resistor will simply create a voltage drop. Thats all you will be achieving.
 
Okedokey said:
So will a single resistor. A diode in series with a single resistor does nothing except control polarity, which since its DC is a non-issue. The resistor will simply create a voltage drop. Thats all you will be achieving.
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...I don't need to debate this with you any longer but, what i said works and is in use since yesterday afternoon.....There is more than 1 type of diode much like there is more than one type of resistor......Your information is flawed in part.
 
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Da Mail Man said:
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...I don't need to debate this with you any longer but, what i said works and is in use since yesterday afternoon.....There is more than 1 type of diode much like there is more than one type of resistor......Your information is flawed in part.
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you have no idea. which exact diode did you use that somehow changes what I said? I bet you used a zener.
 
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fair enough. But please in the interest of the forum, let us know exactly what components you used so others can share from your wisdom.
 
okedokey said:
fair enough. But please in the interest of the forum, let us know exactly what components you used so others can share from your wisdom.
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my wisdom?........from your replies to some of my recent posts, you seem to infer that i don't know what i am talking about!...so, why pollute this forum with information you seem to indicate is flawed?......i am done addressing this topic.
 
Da Mail Man said:
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my wisdom?........from your replies to some of my recent posts, you seem to infer that i don't know what i am talking about!...so, why pollute this forum with information you seem to indicate is flawed?......i am done addressing this topic.
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Hahah, seriously dude, ive made every effort to be helpful not only to you but to anyone else that reads this thread in the future. I wouldve thought since you have found a solution to your problem and since its such a common problem you would share you simple diode/resistor solution. But of course that would be too easy right...
 
wow... from what i hear is dell revised the heatsink to a different model that worked better. beating around the bush here with doing Vdrops on your fan speed with a resistor and diode (which wont do anything as said above 0.7vdrop is negligable...) you probably should be looking into the updated fan provided by dell.
 
wow... from what i hear is dell revised the heatsink to a different model that worked better.
AM AWARE OF THAT, THE SUSPECT SINK HAD I BELIEVE 2 "TUBES" RUNNING THROUGH THE SINK, MINE HAS 6 - I HAVE THE UPGRADED SINK BUT, IS A MOOT POINT AS I NO LONGER HAVE THE PROBLEM.


beating around the bush here with doing Vdrops on your fan speed with a resistor and diode (which wont do anything as said above 0.7vdrop is negligable...)
SORRY TO SAY YOU OR YOUR INFO BASED ON MY CONFIGURATION IS INCORRECT...YES, THERE MAY OR MAY NOT BE A VOLTAGE DROP AS WITH MOST ANY COMPONENT(S) BUT, THAT IS ALL BASED ON THE COMPONENTS USED AND THEIR PARTICULAR CONFIGURATION.

you probably should be looking into the updated fan provided by dell.
DON'T NEED TO - PROBLEM ABATED.
 
OP's problem is "sorted", I think this has run it's course now as we seem to be going in circles.
 
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