- [Instructor] Let's not forget about laptop RAM.
These are small outline DIMMS, or SODIMMS.
And you might use these for other devices as well,
such as small office
and home office network attached storage devices.
SODIMMS are much shorter than regular DIMMS,
and they are designed that way
so that they can fit into tighter spaces.
We show an installation of two SODIMMS
within the laptop videos section.
Here's a table showing the amount of pins
for each version of SODIMM DDR and some typical speeds.
So we have DDR1 and 2 are 200 pin layouts,
but you're not gonna see those very often.
DDR3 and DDR4 are the ones you're gonna see more commonly.
DDR3 is 204 pin,
and you can see the notch here is to the left of center.
DDR4 is 260 pin, and you can see the notches
to the right of center.
And some typical speeds for that DDR3.
Typical speed, 1,333 megahertz, 1,866 megahertz.
DDR4, typical speed, 2,400 megahertz.
If you would like to see a SODIMM installation
in something other than a laptop,
then check out my NAS box installation,
which is in this video series,
and also its Article 2006 on my website.
Okay, and here it is.
To upgrade the RAM on this Synology NAS box,
I used a four gigabyte DDR3L 1866 SODIMM.
So this box comes with two gig.
I put in a four gig module to bring it up to six gig.
And it's funny, because this stick cost $37
at the time of install.
But as soon as a month, a month and a half after that,
the same exact stick of RAM went as high as $107.
Talk about volatility, and pun intended.
Sometimes, you have to wait for the price
to come down a little bit.
Track the price online with various websites
and make sure you're just not getting ripped off
and paying twice or three times
the amount that you should be.
Sometimes you might have to wait a little bit
or search around for the good price.
So anyway, that's an install of that DDR RAM SODIMM
in a NAS box.
But generally, the installation of these,
you could see what I was doing there.
You can see I'm pressing down on the edges,
and I show this in the laptop RAM install video as well.
But it's a little bit different
than your standard desktop DIMMS.
With desktop DIMMS, you press down straight.
So the RAM stick goes straight into the motherboard,
and it's at a 90 degree angle.
But with SODIMMS, it's a small area that you're working in.
So you put them in at a 45 degree angle,
and then you press down on both edges
until they snap into place.
And then they're flat against the motherboard.
So a little bit of a different installation.
Let's do a quick quiz question together.
And the question is this.
How many pins are on a SODIMM DDR3 memory module?
And I'll give you a couple moments to look at the answers.
And the answer is C, 204 pins.
DDR3 SODIMMS, also known as DDR3L, have 204 pins.
Here's the table of the SODIMM pin outs.
I'm calling this the laptop version.
And we have DDR1 and DDR2 at 200 pin, DDR3 at 204 pin,
and DDR4 at 260 pin.
Plus, here's the table for the desktop version.
The longer DIMMS, the longer versions of DDR
for desktop computers and their pin amounts.
DDR1, which you'll rarely see, 184 pin.
DDR2 and 3 are 240 pin, but they're different layouts.
They're not compatible with each other.
And DDR4 is 288 pin.
So know the differences between the pins
for the desktop version and the laptop versions,
the SODIMMS.
Let's look at the incorrect answers.
A said 288.
Well, that is DDR4 desktop version layout.
Answer B said 184.
That is desktop version DDR1.
Answer D said 200 pin.
That is laptop version DDR1 and DDR2.
They both use 200 pin.
And answer E said 240 pin, which is DDR3 desktop version.
And that's where some of the confusion comes in.
SODIMM DDR3 is 204 pin, 2 0 4.
Desktop version of DDR3 is 240 pin.
So that could be a little confusing.
So memorize these tables here.
But correct answer, C, 204 pins for DDR3 SODIMMS.
All right, so there's a little bit about SODIMM DDR.