CPU fan

[jmjeff]

im looking for a JMC/Datech cpu/case fan model DS9238-12hbtl its a 92mm x 38mm its a 12volt 5700rpm with 123 cfm. it fits a Dell 4550 3.06 gig. I put a standard 3 wire fan in but the mobo doesnt see it, it wont run. every time i boot it says fan failure.
I have installed a 120volt fan to cool it until i find a replacement.
I am told a NMB Model 3612KL-04W-B66 fan will work but i havent been able to find it either.
thank you
jmjeff@hotmail.com

[Omardeth]

92 mm on a cpu ? wow thats a big fan .

[jmjeff]

the fan is mounted on the case with a scoop that drops down over the cpu

[chris64]

jmjeff have you tried the inserting the plug the other way or off center.

[chris64]

oh BTW welcome to techimo.

[jmjeff]

i tried different combinations of 2 wires. ive been told that the third wire is a heat sensor?
or it is a 2 speed fan?

[Kc2iLq]

http://www.overclockers.com/articles729/
That's an article at overclockers.com about the dell 600sc which has a weird style fan connector. Read about halfway down the page any you'll see a picture of the fan connector and this:
>Dell puts the tach wire in the center, whereas the standard plug has it off to one side. Even if you forced a standard plug onto the pins, it would not work. The fix is relatively easy - cut the Dell plug from the fan and wire it to the replacement - it works, since I've done it without any problems. <

Whether or not your connector is wired the same is up in the air, but this at least gives you a start.

-Kc2iLq

[FunkZ]

Here's the 92x92x32mm Datech fan. It doesn't flow quite as much air (95 rather than 123 cfm) but it does run quieter and should be a direct replacement for your old Dell fan.

http://www.directron.com/923212hbta.html

BTW - the third wire is the speed sensor. It will relay the rpm's of the fan to the motherboard. When the board doesn't detect the fan speed it thinks the fan is dead and shuts the computer off. You may be able to disable this feature in the BIOS.