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4 pin molex to regular usb adapter?? does it exist?? help!

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March 7, 2012 12:01:36 AM

Ok so i bought this exhaust fan http://www.newegg.com/Product/Product.aspx?Item=N82E168... and it has a 4 pin connector (look at it). where do i exactly plug it in?? i don't have anywhere to plug it on the motherboard. is there such a thing to connect it to adapter which converts it to regular usb, so i can plug it in the regular usb ports on the back of my PC (usb ports like the ones for mouse,keyboard,any electronics...) ?? if it does exist,will it have enough power to run the fan??
ps:sorry im new to things like these

edit: ok i found this one,which is 4 pin to dual usb,but i wonder if it has enough power to run the fan : http://www.amazon.com/gp/product/B006JCHN08/ref=ox_sc_a...

and this one:
http://www.amazon.com/gp/product/B000MGG6SC/ref=ox_sc_a...

so what do u guys think?
March 7, 2012 12:50:07 AM

Don't you have a 3 pin connector? If so then just buy a 4 pin to 3 pin adapter and use that. In all my years of computing, I've never ever heard of a USB to 4 pin adapter being used, however if you want a correct setup that allows your fans to be automatically controlled, use the pin connectors on your motherboard!
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March 7, 2012 1:38:17 AM

Akhilcool said:
Don't you have a 3 pin connector? If so then just buy a 4 pin to 3 pin adapter and use that. In all my years of computing, I've never ever heard of a USB to 4 pin adapter being used, however if you want a correct setup that allows your fans to be automatically controlled, use the pin connectors on your motherboard!

I don't know if I have 3 pin connector.i have motherboard that came with stock HP computer. How does a 3 pin connector look like and where on motherboard is it located? I might have just enough connectors to run fan and other things on mobo and not any extra once since it is HP manufactured mobo.i think it's micro atx but not 100% sure.lemme know
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a b K Overclocking
March 7, 2012 12:50:14 PM

eclipsebmx said:
Ok so i bought this exhaust fan http://www.newegg.com/Product/Product.aspx?Item=N82E168... and it has a 4 pin connector (look at it). where do i exactly plug it in?? i don't have anywhere to plug it on the motherboard. is there such a thing to connect it to adapter which converts it to regular usb, so i can plug it in the regular usb ports on the back of my PC (usb ports like the ones for mouse,keyboard,any electronics...) ?? if it does exist,will it have enough power to run the fan??
ps:sorry im new to things like these

edit: ok i found this one,which is 4 pin to dual usb,but i wonder if it has enough power to run the fan : http://www.amazon.com/gp/product/B006JCHN08/ref=ox_sc_a...

and this one:
http://www.amazon.com/gp/product/B000MGG6SC/ref=ox_sc_a...

so what do u guys think?

To a peripheral connector ( aka; Molex ) on the power supply
http://www.playtool.com/pages/psuconnectors/connectors....


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a b K Overclocking
March 8, 2012 10:33:03 AM

eclipsebmx said:
Ok so i bought this exhaust fan http://www.newegg.com/Product/Product.aspx?Item=N82E168... and it has a 4 pin connector (look at it). where do i exactly plug it in?? i don't have anywhere to plug it on the motherboard. is there such a thing to connect it to adapter which converts it to regular usb, so i can plug it in the regular usb ports on the back of my PC (usb ports like the ones for mouse,keyboard,any electronics...) ?? if it does exist,will it have enough power to run the fan??
ps:sorry im new to things like these

edit: ok i found this one,which is 4 pin to dual usb,but i wonder if it has enough power to run the fan : http://www.amazon.com/gp/product/B006JCHN08/ref=ox_sc_a...

and this one:
http://www.amazon.com/gp/product/B000MGG6SC/ref=ox_sc_a...

so what do u guys think?

One more time

Look at the lower right hand corner of the photo, that's a Molex pass-thru connector, you connect it to a Molex connector from the power supply, and it allows for another peripheral to be connected.
There is no tach cable ( only 2 wires ), won't be able to tell RPM's, it's meant to run full speed, no real point in attempting to power it via the motherboard even if you had a free header.


The firt adapter you have linked to turns a 4 pin connector into 2x 5v USB connectors for charging cell phones and the like, wont work for powering the slot fan.
The second adapter would work, but isn't neccessary if you have a Molex 4 pin connector on the psu.
If for some reason you don't have a Molex connector on the psu, it's much cheaper to buy one of these
http://www.performance-pcs.com/catalog/index.php?main_p...
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March 8, 2012 12:12:08 PM

usb only puts out 5v and .5-1 amp. That may not be enough to power a fan like that. If that fan is 12volt it simply wont work.

The larger 4 pin connector (with 2 empty pins) in the photo goes straight to the power supply. That is an older style molex found on ide(ata) HDs and CDroms. Your newer HP may not have one. If it does simply plug it it in. You can not plug that into the mother board. If your PSU does not have an open molex you will need to get a molex Y , or a sata to molex power adapter.

US this if you do have only 1 or 2 molex and they are in use.
http://www.ebay.com/itm/IDE-Hard-Drive-Molex-4-pin-Powe...



Use this if your PSU only has sata, does not have a molex.
http://www.ebay.com/itm/2-Pcs-SATA-15-Pin-Power-to-4-Pi...


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March 8, 2012 4:18:49 PM

Thanks guys,i found out that i do have both sata and 4 pin molex (wires were really messy lol) from power supply but the 4 pin is not linear rectangular 4 pin (like on this fan) but its square,2 holes next to 2 holes.there's adapters for either of these as u told me,BUT what i forgot to mention is that i want to be able to TURN OFF the fan when not gaming/rendering/video editing (cuz 3200rpm is pretty loud). so i don't think i can do that through power supply or mobo.so only way to turn the fan off is to literally unplug it.am i right?

plus i read in reviews that people have undervolted this fan can run just on 5V so the usb to 4 molex should still work? (and fan to be quieter that way also).anyway i ordered the usb to molex adapter already so we'll see.maybe i am wasting money but i want to be able to turn the fan off. if there's other way i can turn it off without unplug anything,let me know.thnx so far
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March 8, 2012 4:25:24 PM

eclipsebmx said:
Thanks guys,i found out that i do have both sata and 4 pin molex (wires were really messy lol) from power supply but the 4 pin is not linear rectangular 4 pin (like on this fan) but its square,2 holes next to 2 holes.there's adapters for either of these as u told me,BUT what i forgot to mention is that i want to be able to TURN OFF the fan when not gaming/rendering/video editing (cuz 3200rpm is pretty loud). so i don't think i can do that through power supply or mobo.so only way to turn the fan off is to literally unplug it.am i right?

plus i read in reviews that people have undervolted this fan can run just on 5V so the usb to 4 molex should still work(and fan to be quieter that way also).anyway i ordered the usb to molex adapter already so we'll see.maybe i am wasting money but i want to be able to turn the fan off. if there's other way i can turn it off without unplug anything,let me know.thnx so far

Yes if you can find an adapter that'll work with this:
http://www.microcenter.com/single_product_results.phtml...]
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March 8, 2012 4:40:49 PM

^can u turn off the fan with it also?
plus i only have one fan to control the speed of, so i don't really need that
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a b K Overclocking
March 8, 2012 5:05:28 PM

eclipsebmx said:
Thanks guys,i found out that i do have both sata and 4 pin molex (wires were really messy lol) from power supply but the 4 pin is not linear rectangular 4 pin (like on this fan) but its square,2 holes next to 2 holes.there's adapters for either of these as u told me,BUT what i forgot to mention is that i want to be able to TURN OFF the fan when not gaming/rendering/video editing (cuz 3200rpm is pretty loud). so i don't think i can do that through power supply or mobo.so only way to turn the fan off is to literally unplug it.am i right?

plus i read in reviews that people have undervolted this fan can run just on 5V so the usb to 4 molex should still work? (and fan to be quieter that way also).anyway i ordered the usb to molex adapter already so we'll see.maybe i am wasting money but i want to be able to turn the fan off. if there's other way i can turn it off without unplug anything,let me know.thnx so far

What HP do you have that has a spare 2x2 connector hanging out ?
A very good tool to help figure out the connectors
http://www.playtool.com/pages/psuconnectors/connectors....

The adapter you linked to in your first post is Molex to USB, it won't work unless you plan on connecting 4 pin to 4 pin for 5v only, and then you would need a 4 pin peripheral connector from the psu
One of these will work to give you USB to Molex 5v only
http://www.divineo.com/magento/xecuter-usb-to-4-pin-mol...

If you want to be able to run the fan at different voltages a fan controller will be needed
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Again you would need a 4 pin peripheral connector from the psu




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March 8, 2012 5:16:20 PM

eclipsebmx said:
^can u turn off the fan with it also?
plus i only have one fan to control the speed of, so i don't really need that

I don't know if it will turn off the fan or not but I'm guessing if you turn it all the way down it probably will. It'll sure beat opening and closing your case to plug it in and unplug it every time. No?
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