Cooling Mechanisms for the CPU and System Unit Part 1

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Time
12 hours 9 minutes
Difficulty
Beginner
CEU/CPE
12
Video Transcription
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>> Welcome to Lesson 6.1,
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Cooling Mechanisms for the CPU and System Unit.
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This is part 1.
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Our lesson objectives for this lesson is number 1,
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we're going to start with the basics
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of cooling your system,
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so system cooling basics.
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Then we're going to talk about case fans,
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and from there we're going to discuss heat sinks and
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also some thermal paste and liquid cooling.
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We're going to finish up our discussion with that.
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Let's jump right on in and get started.
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System cooling basics.
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Heat is the most damaging thing
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that can occur inside of your computer,
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and it's vital that we
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maintain efficient cooling for
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airflow throughout your system.
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Now, all of your components inside of
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your system are delicate and they need to be protected.
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Heat is the number 1 factor that will
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destroy the components of your system.
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Now, cooling your system is priority.
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Now cooling is actually a couple of factors,
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not just cooling it as we think with fans,
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which we're going to talk about, but also airflow.
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Proper cooling and airflow is the key of maintaining
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temperatures inside of your system and
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protecting your internal components.
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Now, airflow consists of two things,
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intake and exhaust, and
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we're going to talk about that a little bit more.
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Before we step into that, think about this.
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In your CPU or in your case
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rather it's a closed environment there.
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They're sure you have vents and you have
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an exhaust fan on the back
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of a CPU or
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multiple fans depending on a particular model.
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But the key thing for airflow, thus cooling,
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is an intake of air and an exhaust of that air,
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as you can see from the image
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I have right here in the slide,
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intake is from the front vents
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of the computer sometime the
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side vents or the
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vents that pulls the air into your computer,
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that air circulates around inside of the system case and
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the exhaust is normally the fan in
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the back of the computer by the power supply.
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That will pull or exhaust the fan out of the CPU case.
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Again, the key to airflow is intake and exhaust,
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and that's going to keep your system components cool.
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Let's start talking about case fans.
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Now there come in many different variety of case fans.
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Standard case fans,
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what we're all used to accustom seeing,
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you can go through to the aesthetic approach with
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LEDs and lights but the key or
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the bottom-line principle or
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responsibility of the case fan is to
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exhaust or pull that air out of
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the system to maintain or continue that airflow.
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There's some things that you need
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to know about case fans.
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Fans specifications, CFMs,
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cubic feet per minute.
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In your case, case comes up in different sizes.
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When you're building a CPU
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or you're building your own system,
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you have to match that with the proper fan or fans.
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There may be multiple fans depending on
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the case that you're using and the size of the case.
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Cubic feet per minute is
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how much cubic feet depth fan can distribute.
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Is far as how much air can
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exhaust and pull out of the system.
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Fans will come in multiple sizes,
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but the most standard size is 120 millimeter,
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that's the most common size.
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One thing you want to
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consider as well when you're building
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a system or rating a fan for system is the fan noise.
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The fan noise will be measured in db.
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So you want to keep that note as well as far as to
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make sure that your fans will not
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be too loud for the system
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that you're designing or building.
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Also the power draw,
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how much power does that fan draw?
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We're going to talk about the power of
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wattage requirements later on in these lessons,
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but you want to make that a consideration also.
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How much power is that fan going to be needing?
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Now, when it comes to case fans,
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they are two different types of connectors.
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These are like Molex connectors.
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There's a three pin and a four pin.
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The three pin is going to give you
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what you need to power for that fan.
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That fourth pin is going to give you
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some other options and
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we're going to look at that here in a moment.
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One in particular is called the PWM,
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the pulse width modulation.
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What that means is your bios can control the fans speed.
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You can rate that higher or lower,
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you can set that fan speed in the bios.
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Also, you want to consider
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two important factors of our case fans.
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Airflow versus static pressure.
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Now, let's talk about the difference between these.
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Airflow fans operate an open case scenarios or areas.
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So you have your case
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even though you have your cover on the case,
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pretty much air in there is open-air.
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As we learned previously,
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that there's an intake,
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that air is being pulled into the case.
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It's flowing around those components and is being
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exhausted out the back with the fan.
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Standard airflow fan will
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work with that particular environment.
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What if you have something called a static pressure fan?
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What is the static pressure fan?
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A static pressure fan in the gist of it is basically
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a fan that has to push air
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through elements or blow through elements.
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Now you say what elements are we talking about?
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Let's think about this, go a little bit deeper.
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If you have a fan that's on top of either a CPU or GPU,
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a graphics processor unit and you have to
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blow air within the heat sinks
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and we're going to talk about heat sinks in a moment,
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or you have a coolant radiator,
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some type of filter that you have to blow across.
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Some systems have hard-drive cages, which are cages,
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racks of hard drives,
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and maybe it'll be just like on a server setup
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and you have to blow air cross them.
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Your static pressure fans are
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going to be a little bit different
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because they're not exhausting,
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they're more blowing in tight or confined areas.
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You've got to get a little bit more pressure to
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blow that area to keep those components cool.
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That's a static pressure fan and used in
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those different elements and environments.
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