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What if you overvolted ..

post #1 of 15
Thread Starter 
The pump of a h50 ? its runs at 1400rpm , most probably the motor would die but is there any advantages of running it at higher rpm's ? can it circulate the water faster .. has it been tested

just curious , always wondered .
    
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post #2 of 15
Higher flow will typically give better cooling performance. However, I've never tried overvolting a pump before. I am not really sure you can as there isn't really any circutry to control how much current the pump motor gets...at least not on any 12v pump I've seen (no VRMs and such on pumps...no capacitors either). So they just pull as much current as the motor can take.

Though the speed switch might do this...hmm. yeah that woul have to regulate the current :facepalm

Though not in the ussual sense. At the highest setting the speed switch should act like a direct link allowing the max current to go through. However, a bead of solder on this connection would make this a true dirrect link and perhaps over-volt the pump motor.
Edited by Vagrant Storm - 8/1/11 at 7:23am
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post #3 of 15
Thread Starter 
good answer , if the pump can only take in as much power as it physically can then i guess its impossible ..

I wonder what hooking it up to a 17v line would do though hmmm curiosity , it would ruin something for sure tongue.gif

good excuse to get a h100 , broke though ..

so are you saying it could be possible ? bead of solder lol this sounds interesting now ...
Edited by Xristo - 8/1/11 at 7:26am
    
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post #4 of 15
If the flowrate is already adequate you wouldn't see much of an increase in cooling performance, personally I'd say you'd be better of getting a new pump if you wanted to do that but theoretically you could overvolt it and assuming the pump has no safeguards in place to prevent the pump from going outside its specs it should increase your flowrate.

Taking things like pumps outside specs isn't a good idea though because if it dies and you're not in the room you've got problems and motors can overheat easily if they're overvolted.

Obviously if you're set on it and kept the increase very small you could but I really wouldn't recommend risking the pump and your CPU for what would probably be a small improvement.

Edit: Where I say "assuming the pump has no safeguards" that's a borderline ridiculous assumption by the way. frown.gif
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post #5 of 15
Faster flow rate would give the water less time to cool down before being recirculated. I imagine Corsair has it at 1400 rpm for a reason.
post #6 of 15
Quote:
Originally Posted by Methos07;14423533 
Faster flow rate would give the water less time to cool down before being recirculated. I imagine Corsair has it at 1400 rpm for a reason.

No, there'd be more pressure in the rad and blocks leading to better heat transfer from the water in the loop to the rad and blocks.
Flowrate improves temps but not by a whole lot compared to adding more rad, I think overvolting the pump would be a fun experiment but as I said already please don't do this long-term as it would greatly increase the chance of a pump failure.
Edited by Mike-IRL - 8/1/11 at 8:02am
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post #7 of 15
Thread Starter 
Once i get a rasa kit or h100 ill give it a go , the only reason why i think it wouldnt make much difference is because the radiator is so small to begin with and the water would circulate pretty quickly anyway ...

Does anyone know how fast the pump operates on the h80 and h100's ? i assume faster for the 240 rad ..
Edited by Xristo - 8/1/11 at 7:45am
    
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post #8 of 15
Quote:
Originally Posted by Xristo;14423683 
Once i get a rasa kit or h100 ill give it a go , the only reason why i think it wouldnt make much difference is because the radiator is so small to begin with and the water would circulate pretty quickly anyway ...

Does anyone know how fast the pump operates on the h80 and h100's ? i assume faster for the 240 rad ..

Well, the RPM isn't everything for a pump as it also depends on how much water is moved per revolution but I can't find any specs on the pump online unless Corsair are reusing an older CoolIt model.

I found a comparison of the H50 vs. the pump from the ECO A.L.C. if that helps but it doesn't really mean much as the H100 probably uses a newer revision or a totally different pump.

What I can say is the old pump is an Asetek unit and the new one is made by coolit but I'm guessing there shouldn't be too much between the two.
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post #9 of 15
take -12v and +5v line to pump... = ~17.4v ... whos got the stones to test and report?
post #10 of 15
Thread Starter 
Quote:
Originally Posted by CL3P20;14424046 
take -12v and +5v line to pump... = ~17.4v ... whos got the stones to test and report?

Anyone ? its soo tempting !! wish i had a spare to play around with .
    
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