Displaying temps on a drive bay lcd module
Posted 27 December 2006 - 06:14 PM
Posted 28 December 2006 - 04:51 AM
Posted 28 December 2006 - 06:31 AM
The 4 pins diagram is as follows:
1= +12Vcc( usually red wire)
2= GND (usually black wire)
3= SPEED SENSOR (it communicates the current speed of the fan back to the motherboard)(usually white wire)
4= PWM pulse (usually yellow or blue wire)
The computer controls the speed of the fan thru the PWM channel (wire #4). For example, Shuttle barebones have PWM fans for silent use (the fans rotate at minimum speed; when the temperature rises, the motherboard tells the fans to speed up).
Also, some CPU fans require 4-pin connectors (the mainboard controls the speed of the fan).
These fans are backward compatible (they can be used with regular 3-pin and even 2-pin connectors). They just won't be software controlled anymore (some rotate at minimum speed, some at maximum speed, depending on the manifacturer, i believe.)
You will still be able to control the fan speeds with the rheostats. Personally after the first speed readout panel i installed and used for a year or so, i am no longer interested in watching the temps or speeds. I am more interested in how quiet the computer is and have run the computer long enough to know what speed produces what temps.
Posted 28 December 2006 - 09:32 AM
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