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Author Topic: Converting server fans to fans for my PC  (Read 4817 times)

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reyonic

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Converting server fans to fans for my PC
« on: July 05, 2012, 21:27:01 PM »
I need help (if possible) to get these server fans changed to molex connectors

I want to use the server fans for PC cooling, yes I know they are a bit loud but they move an incredible amount of air and I will not be using everyone of them and I will be cutting the power to them down depending on noise and Performance. They are all expensive fans of good quality so I would like to use them instead of cheap pc fans.

So they have strange connectors, 6 pin and I am pretty sure 2 are the led notification lights. I dont want or need those. I would like to change them over to molex connectors but im not sure if it will work and what wires are the important ones.

These are the 3 different types of fans.

I have a bunch of these Proliant DL380g4 fans
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http://www.google.com/imgres?q=hp+proliant+dl380+g4+fans&um=1&hl=en&safe=active&sa=N&biw=994&bih=658&tbm=isch&tbnid=r1uMyZoqdMrMcM:&imgrefurl=http://www.ebay.com/itm/HP-Proliant-DL360-DL380-G4-Hot-Swap-Cooling-Case-Fan-279036-001-/270987555887&docid=SiD15TJFbl7i3M&itg=1&imgurl=http://69.64.75.196/images/web_images/279036-001.jpg&w=354&h=336&ei=IrX1T6yyK6aW2gW4noSDBw&zoom=1&iact=hc&vpx=617&vpy=96&dur=2595&hovh=219&hovw=230&tx=71&ty=62&sig=111094754637614705658&page=1&tbnh=129&tbnw=136&start=0&ndsp=14&ved=1t:429,r:7,s:0,i:97

and both of these types for proliant DL360 G4p, (I would like to use the ones in the blue mount the most.

http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=115&prodSeriesId=452749&prodTypeId=15351&objectID=c00414126

any help would be spectacular I can get more info when im back home and better pictures.

kam

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Re: Converting server fans to fans for my PC
« Reply #1 on: July 07, 2012, 10:43:45 AM »
i could not find any datasheet for "Proliant DL380g4 fans" for the fans pinout :/

reyonic

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Re: Converting server fans to fans for my PC
« Reply #2 on: July 07, 2012, 23:51:40 PM »
I suppose I should have gave you the actual fan information, I tried looking for data sheet but could not find it :(

Manufacturer: SUNON
Model: PMD1204PJB2-A 
DC12V - 0.95A/11.4W

and

Manufacturer: Nidec
Model: V35140-57
DC12V - 1.1A

Interesting I found they sell the 2nd one with different connections to actually be used as a CPU fan.
http://www.aliexpress.com/product-fm/512431663-Nidec-6038-VA225DC-v35140-57-12V-1-1-A-cpu-cooler-heatsink-axial-Cooling-Fan-wholesalers.html


reyonic

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Re: Converting server fans to fans for my PC
« Reply #3 on: July 08, 2012, 00:15:05 AM »
Ok so I took apart the second one, and it looks like its actually 2 fans instead of one with 6 connectors, heres what I see. would it be possible to splice the red and orange / black and gray / blue / yellow together and connect that to my molex cable? The other issue I see is that the Molex has 4 Pins, what one would I leave out? 


reyonic

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Re: Converting server fans to fans for my PC
« Reply #4 on: July 08, 2012, 00:16:22 AM »
I could not add more than one attachment for some reason, sorry its sloppy I did it quick.

cheerio

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Re: Converting server fans to fans for my PC
« Reply #5 on: July 08, 2012, 18:26:29 PM »
i think the yellow and orange cables are for rpm measurement. You if you connect those you might have a weird rpm reading.

reyonic

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Re: Converting server fans to fans for my PC
« Reply #6 on: July 09, 2012, 01:44:51 AM »
I was thinking that too, since i will have a fan controller i dont need the rpm monitoring. What confuses me though is what wires to connect.

Im left with 4 on the molex connecter
Yellow = +12v
Black = ground
Black = ground
Red = +5V

And only 2 from each fan.

cheerio

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Re: Converting server fans to fans for my PC
« Reply #7 on: July 09, 2012, 13:27:23 PM »
for those crappy old fans it is most likely the 12v you need to connect.

reyonic

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Re: Converting server fans to fans for my PC
« Reply #8 on: July 09, 2012, 21:43:46 PM »
Why would you say those are crappy old fans? They are new  >:( What did my fans ever do to you?

cheerio

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Re: Converting server fans to fans for my PC
« Reply #9 on: July 10, 2012, 13:22:42 PM »
i say so because they are not efficient overall. the noise/m³ ratio is bad and i am pretty sure the power/m³ ratio is bad too. if you want to move a lot of air efficiently you want to use big fans. they are silent and do not need much power. This is because they don't need those ridiculous RPM to provide the same airflow. In addition the noise of the moving air is reduced because the speed of the air is lower.

kam

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Re: Converting server fans to fans for my PC
« Reply #10 on: July 10, 2012, 15:41:27 PM »
Since the conversation went that way... i should pop-up  ;D and say that cheerio is right  ;)
I use 4 120mm fans to cool my PC. During winter time, they run as low as 1000 rpm, and the temperature is excellent. During summer, they run faster (1200 for HDD and 1600 for the system) and the noise is still low. If i were to put 40 and 60mm fans, it would be either me or the PC in the same room....

reyonic

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Re: Converting server fans to fans for my PC
« Reply #11 on: July 10, 2012, 16:07:35 PM »
One of these small 80mm fans moves 2x the air my 120x120x38mm fan does, and that thing is huge. Just because they are small doesnt mean they are junk, they actually are not much louder, and if I cut them back they are fine. They are designed for servers so they have to be small and move lots of air. The only reason I wanted to test with them is one because I have them and two because the front of my case doesnt actually have a spot for a fan but I wanted to put one there. Its all mesh and have the perfect ammount of room for the 80mm fan.

kam

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Re: Converting server fans to fans for my PC
« Reply #12 on: July 10, 2012, 19:22:33 PM »
what is the cfm for these? A good 120mm fan may have 35cfm at 800rpm @13.8 dba - this one you barely can hear it works. A faster one 120mm has up to 70cfm at 2000rpm. Typical 120mm fans have some 22-28cfm at around 20dba or less.

reyonic

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Re: Converting server fans to fans for my PC
« Reply #13 on: July 19, 2012, 16:17:31 PM »
134 CFM @ 8000 rpm 43dba If i remember correctly but im pretty sure its louder than that. It's so hot right now I have a fan running in that room so I dont even hear it. Works great. Winter I will have to make some changes, but at half speed its isnt any louder than my 120x120x34 3000 rpm exhaust fan.

kam

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Re: Converting server fans to fans for my PC
« Reply #14 on: July 19, 2012, 17:08:38 PM »
the problem with high-speed fans is that additional noise comes from the high speed blades. Fan manufacturers have tried to decrease the sound by shaping the fins, but eventually all agreed: slow rotation - big blades... So they came up with these 180mm 700rpm monsters which may have cfm up to 80 @18db.