7 volt bummer what fans work

[BigMoe]

what fans work on 7 volts tryed sunon and panaflo L1s no good. will a fan bus work better than a mod to the wires? is there a way to get more than 7 volts say 10 volts?

 

[chopstxxx]

Hmm... I've done the 7-volt trick with all my fans, Sunons, Deltas, Top Motor, etc. and have never had a problem. I've even done the 5-volt trick without having any problems. Are you sure you connected the wires correctly? If you want to reduce the volts to something other than 5 or 7 volts you could use resistors. My physics sucks so I can't tell you which resistance you need, but I'm sure someone can help.

 

[BigMoe]

might it be a psu thatsnot making fans go at 7v im also using a psu i've moded to run without a mobo.

 

[Underclocked]

Nope, some fans will and some won't. Look for fans rated 6-12 volts. Most any would run by starting at 12 and then lowering to 7, but many will not start at 7.

 

[BigMoe]

you know would a fan mate help?

 

[Barnaby W. Füi]

i run all my fans at 5 volts, they are all generic POS's and they all work great

 

[BigMoe]

I mustbe doing somting wrong. I pop out the black wire next to the yellow no both ends on the molex (male,female) ithen remove the red molex wire from both ends ((male,female). I then put the red next to the yellow on both side of molex (male,female) and then the red wire so instead of the molex being yellow, black, black, red its yellow, red, black, black with the two wires from the fan a red in the yellow on on side and a black in the black on the other. This is the right setup yes?

 

[Underclocked]

Sounds absolutely right to me. I think some of these guys have magic motors in their fans.

7volts.com quieting page might be of some help.

 

[Jhhnn]

Uhh, never move the wires around on the psu harness plugs, just on anything that plugs into it. If you're like me, you'll start changing things around, forget, and plug in to a dead short.

I had some trouble following your explanation, here's my method-

Sounds like you're dealing with a pass-thru connector, right? Complicates things a little. Starting from stock configuration,Y-B-B-R, completely remove the black that has the fan ground attached. Completely remove the red that just goes across the pass-thru. Put the loose ends of the fan black where the red came from, put the red in the holes that remain. Stock is Y(fan red)-B(fan black)-B-R, you'll have Y(fan red)-R-B-B(fan black) at both of the pass-thru plugs. The psu harness remains Y-B-B-R. The open end of the pass-thru(female pins) will have stock voltages, 12-Gnd-Gnd-5. This is very important.

7 volts won't work on a psu with no load- there must be sufficient load between 5v and ground to allow for proper electron flow. I've only ever encountered a few Sunons that wouldn't start at 7v, everything else has worked fine for me....

 

[BigMoe]

well jhhnn I put it all back to stock and then did it your way word for word "the way i did it first off"and long story sort shorted out psu fan again rest of fans stoped or 7 volt fan'panaflo l1" twitchs but does not turn" when i put fan 12v fan first on at least psu goesand 12volt fan works. sorry still stuck

 

[Jhhnn]

I'm really starting to think that it's your modded psu/lack of 5v load. take the 7v fan setup and plug it into a molex on a working computer- if it works, you know what's the problem....

 

[BigMoe]

ok thanks