3 pin connector vs. 4 pin connector

[VSD]

I have just ordered a Thermaltake BigTyp 120. Its connector has 3 pin and my mobo socket is designed for 4 pin (Asus P5B deluxe). So I'll have to connect it to a chasis fan socket.

Will my system boot as the CPU fan speed reported by mobo is 0?.

Regards.

 

[Mousemonkey]

I would have thought that system cut-out would be linked to thermal limit rather than fan speed although it would be prudent to check in the bios to see wether there is a setting that lets you adjust this sorry I can't be more specfic but I don't have that mobo I'm just guessing.

 

[Kenyada]

Check your manual. I think that 4th pin may be a Ground and should allow you to plug your CPU 3-pin plug into it. (Notice the offset of the "key" that holds the fan plug in place)

 

[VSD]

Thank you. Regards

 

[BigTwin]

I plugged my 3 pin fan to the 4 pin CPU fan pins and it's working just fine...(Scythe Ninja)..running about 1250 RPM

 

[swint144]

I think the 4th pin is for a Pulse-Width Modulation (PWM) signal - the mobo controls the fan speed based on CPU temperature and load. Not too many aftermarket vendors have PWM fans, though.

 

[MJL686]

Swint144 is correct about what the 4 pin CPU fan pins but Newegg.com has several 4-pin CPU fan connectors avaliable with really good coolers.
I chose ARCTIC COOLING Freezer 7 Pro simply because of cost ($30) and prior use of the one I used on my P4 478 CPU - keeps it chilled at 82* F idle.
I should have my new system up and running by the end of the week so I will post the results later.
Meanwhile here is a link to the cooler I refering to:
http://www.newegg.com/Product/Product.asp?Item=N82E16835186134
Check it out, the 4 pin really allows one to fully utilize Intel's Conroe CPU
EM64T functions providing you mobo BIOS supports it

 

[VSD]

Thanks again. Regards