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Fan 24V overvolt! - Page 4

post #31 of 59
Can I OC my box Fan? Custom 26" side panel fan FTW!!!
    
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post #32 of 59
This works...very well. I tried it with a Masscool $1.19 30CFM 80mm fan. It wasn't even that loud At 17volts it's no louder than 12 volts, and I can feel it moving a lot more air.
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post #33 of 59
yeah same here I cut up an old power dell or bell or some things power supply and use the cables to make a connection for both 24 and 17 volt. my computer is till silent I used 24 volts for my large fans 17 volts for the 80mm fans.
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post #34 of 59
I'd try this when I'm getting myself to make a jump-starter
I'd probably just do this on an old fan... and destroy the thermistor on it.
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post #35 of 59
the thermistor is that on the fan or mb and its for the cpu fan right? cant you just increase the speed on the bios?
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post #36 of 59
Thread Starter 
Quote:
Originally Posted by Cheetos316 View Post
That's what I'm talking about! Overclocking CPUS and overclocking fans! That's really cool. I'm going to have to give that one a shot. It is potentially possible to rig it up so that you have a dual-pole dual-throw switch to switch the fan between the stock and overclocked speeds for when you really need the airflow... hmm.....
You don't need a dual throw. You can do it with a standard switch.

See diagram.

EDIT: DOH! Got my wires the wrong way round. Fixed now though!
    
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post #37 of 59
Workx fine...check my post in the Intel Air Cooling section-> 24v PSU conv. + 2x 24v ebmPapst blowers

From what I can tell the part number on the fans is 4214, and they run 18-28vdc, around 97-130cfm....the website graph was not that informative.

posted some pics of the finished PSU and fans.
post #38 of 59
lol 24 melted my 120mm fan lights still work hehe
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post #39 of 59
I'm going to try to get my busted power supply running (it needs to be warm before it will actually provide any power), and then connect a fan to it. I've always wanted an airplane... now I'll have one.
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post #40 of 59
Volt modding fans used to be common. I remember doing this myself on some fans when I still had a Pentium 3. Either I'll turn my generic cpu cooler into a screamer or blow out a 80mm. Some fans (mostly 80mm fans) in my experience don't seem to take the over-voltage very well. I managed to mess up a generic fan that was in my case with 17 volts; it now makes a funny buzzing noise and runs a little slower than normal. I burned out two Panaflos on 17 volts by accident as well; ment to hook up a different fan but the wires got crossed. They both ran for a few seconds then slowed down to like 60 rpm then died with a popping sound and a strong "burned out electronics" smell. I've gotten a Sunon 80mm fan to run on 18 volts from my HO scale electric train power supply before but haven't tested it yet on a computer power supply. I read you can probably get Vantec Tornados (made by Sunon) up to 21 volts (17 at most with a computer PSU) . Most 12 volt Deltas can be operated on 24 volts.

Some small fans like gpu coolers and a good amount of heatsink fans work on higher voltages as well. I heard the original Golden Orb could take 40 volts before smokeing.

Anyway, for 24 volts; connect the positive wire on whatever you want to overvolt to the yellow wire on any molex connector and the negative wire to the blue wire (-12 volts) on the motherboard connector. For 17 volts, you'll be connecting the negative wire to the white wire (-5 volts). The -12 volts on PSUs were used to power some ISA slots (some ISA cards needed the negative voltages) but it isn't really used much anymore since motherboards now have PCI and PCI express mostly. Do be aware that some newer PSUs may not even output anything on their -12 volt rail since it is rarely used today.
    
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