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How exactly do you make FANS suck or Blow

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Exiler

Member
Joined
Feb 17, 2001
Location
Ontario, Canada
Allright, I hear you people say that Fans should be sucking air FROM the CPU instead of Blowing Air TO the Cpu (From the post does the motherboard Header burns out).

Just how exactly do you make it suck or blow, I mean, what do you just turn it over to make it, or is there a special way I havent heard off.

Btw as the previous poster he said he did not want to burn out his header, but if he uses a 3 pin to 4 pin adapter then he looses his ability to monitor the Cpu Fan speed.

I was wondering if this method works for monitoring Fan speed using the Motherboard headers:

1) Cut off an old 3 Pin connector from a used fan with all the Wires intact, just cut off the fan.
2) Connect it to the Mobo Header #1
3) With a knife, cut off the Blue wire and expose the wire.
4) The Delta 38 CFM fan to now goto the Heatsink, connect the 3 Pin adapter to a 4 Pin adapter.
5) Cut off the Delta's BLUE wire, with the wire exposed, cut only in the middle of the wire, so you can save for future reconnection.
6) Connect the 2 blue wires together. Use a non conductive tape, usually they are called electric tape, this is not some transparent tape or anything, this ensures to much heat will not burn off the tape.
7) Now that 2 blue wires are connected, power off the Puter and see if the monitoring works.

Well what do you guys think, will it work? I will test out out in 3 hours, once I pick up my new Cpu off the post office.
 

batboy

Senior Moment
Joined
Jan 12, 2001
Location
Kansas, USA
Cool idea about connecting the blue wire. Don't know if it will work, but it seems logical that it should. Post your results. Gotta luv it. You guys are always thinking. Guess 4000 heads are better than one.

Yeah flip the fan to suck or blow. Usually the manufactor's label is down for blowing and the label is up for sucking. The Delta has a black label that is the direction of air flow.
 

DE

Registered
Joined
Feb 4, 2001
batboy (Mar 24, 2001 01:55 p.m.):
Cool idea about connecting the blue wire. Don't know if it will work, but it seems logical that it should. Post your results. Gotta luv it. You guys are always thinking. Guess 4000 heads are better than one.

Yeah flip the fan to suck or blow. Usually the manufactor's label is down for blowing and the label is up for sucking. The Delta has a black label that is the direction of air flow.

Using just the tach wire works fine.
 

Da Whip

Senior Member
Joined
Feb 2, 2001
Location
Sunny Florida, you can keep the midwest!!
If you look on the side of almost all fans (Sunon, Pabst,Delta, Assa and even generic) they show both what direction the fan is blowing, but also which way it is rotating.
You will notice on some of the older PSU that they have the fan sucking air into the PC. Bad idea, simply pull off the PSU's cover and reverse the fan.
 

Phil

Senior Member
Joined
Jan 13, 2001
Location
Bolton, UK
I think you need to also attach the ground wire, I don't know if this is essential for getting a reading but it can affect it, when I plugged the 60mm ys-tech into my motherboard header it gives double the rpm, but when I have another fan attached to it but with the monitoring lead from the ys-tech I get the correct reading so I am guessing that the ground wire affects it