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Thread: How to choose the correct fans for your pc 101-Power and Control

  1. #1
    Will lift for boobs! Flex's Avatar
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    Default How to choose the correct fans for your pc 101-Power and Control

    Thought all PC Case fans are equal? Well think again!

    There are many factors to consider all depending on your current build.

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    Power and Speed control

    There are 2 options being a 3 pin or 4 pin (PWM).
    Most older mobos have 3 pin fan connectors, with most new fans having 4 pin connectors.
    The 4th pin allows you to control the fan speed via software without adjusting the power being delivered to the pin. If you want to change the speed on a 3 pin fan then you have to change the power being delivered to the fan vie the 3 pin. This means that if it is an LED fan, the LED will dim and not be as bright as on 100% power.

    You can fit a 4 pin on a 3 pin and other way around as well. You do however get connector for 4 pin fans to 3 pin connectors as well.

    As with the Water Cooling, I will be doing the fans 101 in segments to soo how much interest there is before writing a 50 page write up!
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    3 Pin fan plugged into a 4 Pin connector on the mobo

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    Bargain Hunter mottamort's Avatar
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    Sadly my case takes 140mm fans....something I just cant seem to find in SA anymore

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    Quote Originally Posted by mottamort View Post
    Sadly my case takes 140mm fans....something I just cant seem to find in SA anymore
    Hmmm...as does mine and I find 140mm fans everywhere.

    Mostly Corsair, Thermaltake, Coolermaster and Bitfenix branded 140mm fans

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    Will lift for boobs! Flex's Avatar
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    Quote Originally Posted by mottamort View Post
    Sadly my case takes 140mm fans....something I just cant seem to find in SA anymore
    140mm fans are getting more popular and easier to find than 120.

    Rebeltech, Titan Ice, Eve Tach, Wootware

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    Quote Originally Posted by Flex View Post
    140mm fans are getting more popular and easier to find than 120.

    Rebeltech, Titan Ice, Eve Tach, Wootware
    I find they push more air (CFM) than the smaller 100mm and 80mm fans; But CFM is also related to RPM

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    Will lift for boobs! Flex's Avatar
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    Quote Originally Posted by PsychoFish View Post
    I find they push more air (CFM) than the smaller 100mm and 80mm fans; But CFM is also related to RPM
    Very true yeah. Will be talking about CFM and SP in the next one yeah

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    Quote Originally Posted by Flex View Post
    Very true yeah. Will be talking about CFM and SP in the next one yeah
    Best you cover Static pressure as well

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    Will lift for boobs! Flex's Avatar
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    Quote Originally Posted by PsychoFish View Post
    Best you cover Static pressure as well
    Hehehe yeah cfm and sp as mentioned

    Sent from my SM-G900H using Tapatalk

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    Bargain Hunter mottamort's Avatar
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    Mmmm...Maybe my case was before its time, as I last looked a couple years back and everyone told me they aren't available anymore (keep in mind i'm not exactly in a major center). Just quick checking and yea, 140's are available online.

    Sweet!

    coz my case takes 120/140, and obviously the bigger one is better (lower rpm therefore quieter for same airflow)

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    Thread Killer Mk VIII czc's Avatar
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    Are you going to cover positive pressure vs negative pressure into the case via fan setup?
    T A N S T A A F L

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