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- Let's demonstrate how to
calculate the power that we need

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and we'll be using a power
supply calculator to figure

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out the wattage, the
total wattage required

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for all the components within a computer.

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And I'm just going to make
up the system as we go.

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And there's several power
supply calculators out there.

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Here, we have power supply calculator

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at the Cooler Master website

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and have another one here at
OuterVision, which is good

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if you're going to be doing
video card overclocking

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and other types of
overclocking, but to start

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we'll leave the overclocking
out of it, out of the equation

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and we'll start building our
system here to see how powerful

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of a power supply we'll need.

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So we're going to assume that
this is a desktop computer

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and we're going to use an Intel CPU

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and going to go, as far as
the recording of this video,

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this will be a newer system

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and we're going to use the LGA 2066 socket

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and we'll select something here.

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Let's try the 9820 Core I9,

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that's a pretty powerful CPU.

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TDP, thermal design power,

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generally, they recommend you're at 90%

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if you're going to be doing
overclocking or really

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taxing your CPU or heavy
duty gaming and stuff

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and heavy duty design,
those types of things, lots

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of video rendering, you
might want to bring it up

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to a hundred percent TDP.

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Okay, we'll select our memory

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and we'll say that we're
going to have, let's say four

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and we'll say four,

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four gigabyte.

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Well, let's bring it up
to eight gigabyte four

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eight gigabyte DDR4
Modules so that we can have

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a quad channel installation.

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Okay, then we'll select our video card.

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I'll go with Invidia, you know?

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Yes, I'm doing Intel and Invidia for this

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and we're going to do one card.

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Let's go with say the GTX 1080.

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That's a good place to go here.

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Only one card for now,

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we're not doing any SLI,
but when maybe we'll show

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that after.

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Okay.

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So a video card, if we do a second one

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we'll see how that goes.

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Okay, storage.

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We definitely want to
have an M.2 and sorry

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for the dropdown menus there.

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And we'll do one M.2

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and then as a secondary
type of thing, we'll do

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an SSD, maybe even that
runs the operating system

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and maybe you have games
running here or design programs

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or video programs or whatever.

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Optical drives,

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well, you may or may not have one.

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It's not going to make
that much of a difference.

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We'll say we'll put in a
combo drive here, okay?

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And it could be

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that you want to add
additional cards, TV Tuners,

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sound cards, additional ethernet cards,

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we'll leave that blank for now

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and we'll just assume
that the motherboard has

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all the connectivity that
we want for the time being.

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Okay.

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And they give you options

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for bitcoining modules and
all kinds of other stuff.

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You might also need
some additional devices

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so let's just say that we
have four USB 3.0 devices

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standard keyboard and mouse and fans,

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chances are we're going
to have several fans.

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So let's say we pick two additional,

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120 millimeter fans, no liquid cooling yet

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and we'll say computer utilization.

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We'll leave that as eight
hours per day, okay?

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So to review, we've got a Core I9

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with an LGA 2066 socket running

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at 90% TDP, 32 gigs
altogether, four sticks

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of DDR4 quad channel setup,
a GTX 1080 video card,

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an M.2 card for our SSD

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and then a separate SSD,

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the 2.5 inch SATA drive,
a combo optical drive

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and four USB devices and
keyboard and mouse, two fans.

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So then we can go down and
calculate it and it tells us,

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hey, recommended wattage, it's 567.

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Now a good engineer, always over plans

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a little bit, does a
little bit higher than what

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you really need.

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So you definitely would want a 650 watt.

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They recommend a 750 watt

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and they give an example here

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but let's say we did go at
650, probably would work.

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Here's an example of a 650
watt power supply from CORSAIR.

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And this is a real heavy duty
power supply, long lasting,

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an efficient, quiet power, quiet fan,

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and it's partially modular.

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You've got connections
going out to the motherboard

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and so on

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and then some inserts
here, some modular inserts

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for devices.

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So that's a 650 watt, but we
could always increase that

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and go with, say 750 or 850.

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They're recommending a 750.

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And generally that's
probably what I would do.

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I would go about 25% higher
than what I think the wattage

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is going to be.

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Now you can go and look at each
of these devices and figure

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out, you know, what each
of these devices will

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use individually and then
add it together as well.

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But these calculators do
a lot of the work for you

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For example the TDP, the maximum TDP

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for the CPU I'm using on
this computer Core I7, 5820K,

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the computer I'm working on right now

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that is a TDP of 140 watts.

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So you could add all that
stuff together individually.

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But let's say

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that you wanted to build
some type of gaming system,

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now you might not go with Intel at all,

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you might go with AMD

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but we'll stick with the
Intel platform for now.

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And so we'll bring this
up to the 9900 chip

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which brings this up to 3500 megahertz,

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we'll increase the TDP
to a hundred percent.

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You know,

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if we're going to do super
duper gaming, we'll do that.

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We'll leave the ram as is

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but we'll include a second video card

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and we'll turn on SLI

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so we can actually select that.

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And we'll do another GTX 1080,
'cause if you ever do this

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you want the video cards to be the same.

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And SLI means that you're going
to connect the two together

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so that they can work in
conjunction with each other.

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Perhaps we'll do two M.2s.

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Maybe they'll be set up

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as raid zero and then a
separate SSD altogether.

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And you know, to really get
into this, we might include,

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say a dual port ethernet
card or a quad port

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and then we could do link aggregation

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and have a much better network connection.

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So let's say we'll add
something like that as well.

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And you know, we might include
a liquid cooling system.

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You might not need these fans.

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I'll just change that to one for now.

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Okay, and we'll calculate our
new, more powerful computer.

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And look at the amount goes all the way

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up to 780 watts required

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so they recommend a thousand watt PSU.

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And usually that's pretty common.

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That's typical.

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If you're going to have a gaming computer

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or you're going to have
a heavy duty computer,

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aided design computer
or something like that

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then a thousand watt
power supply is generally

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what you're going to want.

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And here's the other thing,
that's going to utilize six

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or seven AMPs on a circuit.

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So, really, if you're going
to do this kind of thing

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it's a good idea to
have a dedicated circuit

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for your computer workstation as well.

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Right, so there's a little
bit about power calculations

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and always figure out what
the wattage's going to be

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but plan to go beyond that.

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Grab something that's going
to be about 25% more powerful.

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And especially if you're
not sure later on,

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you might add a video card
or something like that

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and you really don't want to have

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to add another power supply

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and change the power supply
out and all those connections.

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So think for the future as well,

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look into your crystal ball
and see what you might use.

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All right?

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So there's a little bit about
power supply calculations

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and that's it for this video.