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RPM on fan

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Miknow

Member
Joined
Mar 23, 2001
Location
Suwanee, GA
I only have 2 fan headers on my mobo and Im gonna use 4 fans. Problem is I wanted to know if the mobo detects fan speed on the 4-pin connecters I know it does on the 3-pin but Im planning on using Swiftechs M371 and they have peltiers on them people perferred I use the 4-pin for enough power but then would I still get reading of the fan speed
 
S

Storm

Guest
If the fan has a positive and a negative cable and nothing else into the 4 pin plug, then you can't monitor the fan speed. However, if it has a spare cable (yellow probably) then this is likely to be the RPM sensor, and it's possible to attach this to a 3 pin plug and then plug it in to get an RPM reading, without worrying that you're overpowering your mobo fan headers.
 

markedmundb

Senior Member
Joined
Dec 18, 2000
Location
Kent, UK
Best thing to do is if it's got a yellow (or Blue?/Green?) cable at one end (opposite the black lead), pull it from it the plug and attach it to the mobo header.