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Laptop fan in desktop?

post #1 of 8
Thread Starter 
I modified an old Apple PowerMac case (I am an apple fanboy, but I love PC hardware) to fit my first PC build. After doing the case mods and seating the motherboard, everything was gravy... until I closed it. I booted the computer to hear my CPU fan blazing. I checked BIOS and, sure enough, the CPU fan was running 6000RPM. Not good. Turns out the PSU is <5mm away from the end of the CPU fan. I first placed a spare 80mm case fan sucking air from the CPU towards the back of the PSU to be exausted, but the fan was still running at 100%. My next idea is to use a laptop fan (the flat kind) that will blow air thru the small clearance. As a side note, with the case closed, the CPU temp was ~32C. Here is the fan I'm looking at. I can solder/rewire if needed, so that is not a problem. But will this fan work?
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post #2 of 8
I don't see why it would work. The only issue would be changing out the connector. The one on these smaller fans isn't compatible with motherboard connectors. Just cut the end off and use a regular 3 pin connector in it's place. I'm pretty sure psu fans use the same connector, and I've modded a couple of those into usb fans. biggrin.gif
    
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post #3 of 8
Thread Starter 
Well I have an extra system fan (3 pin) to molex converter lying around, maybe that could be modded to work with it?
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post #4 of 8
That should work just fine, just line up the exact colors and it won't blow up tongue.gif now get to snippin...
    
CPUMotherboardGraphicsRAM
Q6700 P5E x38 5770 1GB 4x 1GB OCZ REAPER HPC 1200MHz 
Hard DriveOSMonitorKeyboard
WD 640GB Caviar Black Windows 7 Ultimate 64-bit Samsung 2233BW OCZ ELIXIR gaming keyboard 
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Corsair HX620W Antec 900 - modded SteelSeries Ikari optical Razer Goliathus ALPHA 
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CPUMotherboardGraphicsRAM
Q6700 P5E x38 5770 1GB 4x 1GB OCZ REAPER HPC 1200MHz 
Hard DriveOSMonitorKeyboard
WD 640GB Caviar Black Windows 7 Ultimate 64-bit Samsung 2233BW OCZ ELIXIR gaming keyboard 
PowerCaseMouseMouse Pad
Corsair HX620W Antec 900 - modded SteelSeries Ikari optical Razer Goliathus ALPHA 
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post #5 of 8
Thread Starter 
Well, the fan arrived today and I tried soldering the wires and it worked. The fan even runs at regular speeds, not full blast. smile.gif that means I don't have a noisy fan bothering me. I'll post pictures later for anyone who may have the same idea I have.
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post #6 of 8
yea i would like to see pics.
    
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post #7 of 8
pics would be nice, its a good idea
   
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core 2 duo P8700@2.53GHz 2242CTO Intel X4500MHD 4gb 
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fujitsu 320gb dvd rom cd/rw Windows 7 Professional x64 15.4" 
PowerCaseMouse
Panasonic 6-cell + 65W AC adapter lenovo t500 Logitech MX518 
CPUMotherboardGraphicsRAM
Intel i5 760 evga p55 sli MSI gtx460 Hawk corsair dominator 
Hard DriveCoolingOSMonitor
kingston ssdnow hyper 212+ windows 7 professional sam syncmaster 
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Acer Razer Blackwidow ocz 650W coolermaster elite 335 
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post #8 of 8
Thread Starter 
Well I started with the standard Molex to System fan cable that comes with most case fans. I looked at it and realized it was just a "hot" cable with a grounded one. This means that there is no speed control, and thus the fan might not run. I was lucky enough to not have this issue, but the fan started at a high RPM and then dropped to the standard fan speed. Sorry that the photos are blurry, the only camera I have is on my phone.
IMG_0091.jpg
IMG_0094.jpg
This is the soldering. The black wire is the grounded one, the red one has the current. The yellow cable is the one that controls the fans speed. I also removed the casing to expose the wire because it's easier to work with.
IMG_0097.JPG
And the final product (with electrical tape to make it look nice):
IMG_0090.jpg
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