3 pin fan onto a 4 pin mobo plug?

[kcbass]

I just bought a new 120 mm fan to go on my thermalright sp-128 for my cpu, and the stock intel cooler has 4 pins connecting to the cpu_fan plug on my mobo...my 120 mm fan only has 3, so which do i leave unconnected? Can anyone link me to a pinout of the stock intel heatsink so I know if I have to rewire anything? 

 

[Operandi]

You can connect it you'll just lose RPM control (unless you happen to have an Asus board).

 

[Zepper]

If you just look closely at the mobo connector and your new fan connector you'll see there is only one way they can go together w/o forcing. Don't make things more difficult than they have to be...

.bh.

 

[kcbass]

omg...i do have an asus board. yay. Asus p5b deluxe.

Oh, and Zep, I haven't actually taken the mobo out of the box yet, i just noticed that the intel stock fan has 4 conductors, and the one I will be using has three, so I just wanted to make sure.

 

[gramboh]

Sorry to hijack, does this mean if I buy an Asus P5B Deluxe and use a Scythe S-FLEX 120mm fan on my heatsink and plug it into the MB header I can control the RPM with Speedfan?

 

[kcbass]

not sure, but that's what I hope to do, and that's exactly the hardware I'm using.