Different Types of Mobos:
A computer motherboard is nothing but the circuit board or the circuit which controls the
entire functioning of the computer. All the components that make up your computer are
connected to the motherboard. The computer processor, which is the most important
component of your computer, is mounted on the motherboard. All other components like the
keyboard, monitor, mouse, hard drives, etc., are all connected to the motherboard through
cables.
Why is it important to know the different computer motherboard types? Well, if you are
planning to assemble a desktop computer, then this is the most important question that needs
to be answered. Computer processors are motherboard specific and so are the computer
cabinets. So it is very important that you know the different types of motherboards before you
start with the assembly process.
Types of Computer Motherboards
There are different ways to classify motherboards, which are:
Classification Based on Assembly
Integrated Processors
Video, graphics, sound... such facilities involve components. Peripheral device slots, serial
parallel ports and input output ports are other physical components or parts that are involved
in the working of a computer. When such components are provided for by the motherboard,
i.e. they are built into the motherboard, the motherboard is called integrated.
For example, to make a computer capable of connecting to networks, a network card is
integrated onto the motherboard itself. So you do not need to buy a network card. This sort of
motherboard allows for better air flow within the computer's case. Integrated motherboards
cost less to make but their downside is that, if even one component on the motherboard fails,
the entire board might have to be replaced. Repairing or replacing this sort of motherboard, is
expensive.
Non-integrated Processors
With non-integrated motherboards, electronic components and parts are fitted individually and
as needed. Input output ports, connectors, RAM etc. are fixed to the motherboard using
expansion slots. So you can add one or more components as needed. This allows for greater
customization and freedom in designing a PC. Gamers, for example, could fix a high-end
graphics card of their choice, using the expansion slot, instead of settling for an average video
card on an integrated motherboard.
But customizing a motherboard can get expensive and this is the problem with non-integrated
motherboards; the initial cost is high as components need to be bought and fixed. Plus, there
should be enough expansion slots to accommodate the multiple components. However, if a
single component fails, then only it has to be replaced or repaired, which is a cheaper
operation as opposed to replacing the entire motherboard.
Classification Based on Processor
This way of differentiating computer motherboards is based on motherboard socket types. The
CPUs that are available in the current market, are compatible only with specific motherboards.
Socket A Motherboards
These motherboards are meant for AMD and Durons processors. The Socket A motherboard is
also known as Socket 464 motherboard. The CPU socket in the motherboard has 462 pins and
it comes in a PGA (Pin Grid Array) packaging. The bus speed of this type of motherboard is
100 to 200 MHz.
Socket 370 Motherboards
Meant for Intel Pentium III and Celeron processor, this motherboard comes for CPUs with 370
pins. It can also support VIA Cyrix III and VIA C3 processors. The bus speed for this type of
motherboard is 66 to 133 MHz and it also comes in a PGA package.
Socket 378 Motherboards
This is meant for Pentium 4 processors. It also comes in a PGA package and has 478 pins. The
bus speed is 100 to 200 MHz. This motherboard can also support Intel Pentium 4EE and Intel
Pentium M processor. This type of motherboard is also known as Socket N motherboard.
Socket T Motherboards
Also known as LGA 775, this motherboard is meant for Intel Core 2 Duo, Intel Core 2 Quad
and Intel Xeon processor. Of course, this motherboard can also support other Intel processors
such as Celeron, Pentium 4, Pentium D, Celeron D and Pentium XE processor. Its
specifications include 775 pins and a very high bus speed of 1600 MHz. It also comes in a PGA
package.
Socket 939 Motherboards
The Socket 939 is meant mainly for the AMD family. It can support AMD processors like the
Athlon 64, Athlon 64 FX, Athlon 64 X2 and Opetron. It has 939 pins and can have a bus speed
from 200 to 1000 MHz. Just like the types described above, it also comes in a PGA package.
Socket AM3 Motherboards
Socket AM3 is among the most recently developed motherboards. Introduced in 2009, this
motherboard is meant for AMD Phenom II and AMD Athlon II processors. It has 941 pins and a
bus speed range of 200 to 3200 MHz. The packaging for Socket AM3 motherboard is PGA.
Socket H Motherboards
The Socket H or LGA 1156 is meant for Intel Core i3, Intel Core i5 and Intel Core i7processors.
It has 1156 pins and comes in LGA (Large Grid Array) packaging.
Classification Based on Dimension
The dimensions of a motherboard, also known as the form factor, is another way of
distinguishing between different motherboard types.
ATX Motherboards
The ATX (Advanced Technology Extended) motherboard has a length of 12 inches and a width
of 7.5 inches. The I/O ports and USB ports meant for the motherboard are integrated directly
in it. The bus speed in ATX motherboard is 100 MHz. This board is mainly meant for Intel
processors.
Full AT Motherboards
This was the first type of motherboard, which was 12 inches wide and 11 inches long. This
motherboard suffered from a lot of problems, like cumbersome access to components and
overheating.
Baby AT Motherboards
With a dimension of 10 by 8.5 inches, this motherboard is meant for classic Pentium
processors. The DIN keyboard connector at the top right corner of this motherboard, makes
recognizing this motherboard a relatively simple task.
How to Determine a Motherboard Type?
Normally, the documentation that accompanies the motherboard, is the best way for
determining your computer's motherboard. If in case you do not have access to those
documents, you can go to the System Devices tab located in the Device Manager and try to
find your motherboard type. You can also run msinfo32 to find information about the installed
hardware. There are various other third party programs too, which you can use for
determining the motherboard. You can also simply open the cabinet of your CPU and look for a
label on the computer's motherboard. It is usually present in the upper left or right corner of
the motherboard. Another way of finding out the motherboard is, if you can locate the FCC
(Federal Communications Commissions) identification number of the motherboard and perform
a search on the type of motherboard using the same.
The type of motherboard used for your computer is also used for determining various other
factors. For example, DDR SDRAM is the fastest of all the different types of RAM and only
Socket A motherboards can be used for the same. Similarly, SDRAM is compatible with Socket
370 and RD RAM with socket 478. Similarly, the type of motherboard determines various other
factors too.
Read more at Buzzle: http://www.buzzle.com/articles/computer-motherboard-types.html