Motherboard sketch with labels

I would like you to post the model number of the eMachines desktop computer.
Post in a Comment.
Then I will give you EXACT information.
Chipsets, processor socket, and all. Tell you what the various expansion slots are, what Ram Memory, etc.

The front of your computer is the Front Panel.
The area of contact pins on the motherboard, that the main wires from the Front Panel go to, is the Front Panel header.
Need a pinout?

If you are just looking for generic information, well here;

Chip and Chipset are slang terms for I.C.
Integrated Circuit,

http://en.wikipedia.org/wiki/Integrated_circuit

The I.C, or chipset for graphics, is the graphics chipset, or
G.P.U.

http://en.wikipedia.org/wiki/GPU

This is a Motherboard Diagram,

http://en.wikipedia.org/wiki/File:Motherboard_diagram.svg

CPU stands for Central Processing Unit. Another term used is Microprocessor, or simply Processor for short.

The Front Side Bus, or FSB, connects the Processor to the Northbridge chip.
Think of the Front Side Bus as the 'Information Highway'.

The Northbridge chip, and Southbridge chip, is the motherboard chipset.

Now this is in reference to a motherboard, that does Not support the Intel Core i3, i5, i7, and i9 processors.
Different technology.

The Northbridge handles the faster capabilities of a computer.
The Processor, Ram Memory, and HIGH-speed graphics.

AGP and PCI Express are high-speed graphics.
A PCI graphics card plugged into a PCI expansion slot, is NOT high-speed graphics.

The Northbridge chip is connected to the Southbridge chip, through the Internal Bus.
The Southbridge chip handles the slower capabilities of a computer.
Anything connected to the;
IDE bus
SATA bus
USB bus
Ethernet bus
Audio (Sound)

The Southbridge chip is connected to the Super I/O chip, through the LPC bus.
You can see what the Super I/O chip handles.

More detail?
Put this in the Wikipedia search bar, one at a time, and read;
Processor
Front Side Bus
Northbridge (computing)
Internal Bus
Southbridge (computing)
LPC Bus
Super I/O

Anything you see in blue you can click on, to get more information about it.

A motherboard example;

http://en.wikipedia.org/wiki/File:ASRock_K7VT4A_Pro_Mainboard_Labeled_English.svg

The AsRock K7VT4A motherboard uses a;
VIA KT400A - Northbridge chip,
VIA 8235 - Southbridge chip

http://en.wikipedia.org/wiki/List_of_VIA_chipsets#Slot_A_and_Socket_A

http://en.wikipedia.org/wiki/List_of_VIA_chipsets#Southbridge_chips

Using this knowledge you can start to determine what Processors it will support (use), what Ram Memory it will support, and so on.

More info on Motherboards,

http://computer.howstuffworks.com/motherboard.htm

http://www.hardwaresecrets.com/page/motherboard

As I stated previously. If you want more information on your eMachines motherboard, state the Model Number.
(Some examples, T1090, W2260, E4264 )

State in a Comment.
Regards,
joecoolvette