CPU fan's wire function (3-wires type)

I've just bought a new fan with heat-sink
for pentium MMX on second-hand
mainboard form local computer store.
It is 3-wire type. (red, black and yellow)
Unfortunately, there is no 3-pin connectors on the M/B, but, I still have 4-pin power connectors form chassis
fan avialable for this CPU fan. So, I need
to know the 3-wire's function.

Anybody can tell me what is the function
of each 3 wire? I guess one of them is
power, an another one is ground, and
the last is fan speed signal line, but
which one is the signal? The yellow?
LVL 2
vipatAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

jhanceCommented:
Yes.  The other two should be red and black.  Black is ground and red is +12V.  If you MB doesn't support the yellow fan signal, you can leave it off.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
vipatAuthor Commented:
Thanks. I'll try connect it. :-)
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Components

From novice to tech pro — start learning today.