Display Card is also known as Graphics Card, or Video Card.
It is a separate adapter card that plugs into the motherboard.
On the graphics card is a GPU. Graphics Processing Unit,http://en.wikipedia.org/wiki/GPU
(That is the Processor for the graphics card. The graphics card also has it's own graphics ram memory )
IF, a GPU is mounted directly to the motherboard, and not removable, (Therefore not replaceable), it is Integrated Graphics.
Also known as OnBoard graphics.
ON the motherBOARD.
Computer manufacturers, and consumers, erroneously refer to Integrated graphics as a graphics card.
Manufacturer's because they are trying to push a product, consumers because the industry has taught them wrong.
There are several styles of desktop computers. The two main styles with variations, is the 'pizza-box' style, and the tower style.
Depending upon the style, there may be a 'Daughter Card or Daughter board', placed in a slot on the motherboard.
In a slot on the daughter card, the graphics card is placed.
There are 3 main types of graphics expansion slots used. (Older one is ISA, but left out due to age)
PCI, AGP and PCI-Express.
These are technologies. They are also the names of the individual graphics expansion slots, the graphics card sits in.
The slowest of the technologies. Uses a parallel bus, and is handled by the Southbridge chip. (Of the motherboard chipset)
Usually whitish in color. 164 contact pins long. 82 on each side.
Technology that came out for graphics cards after PCI.
Usually Brown or Black in color, but can be any color. Is shorter in length than a PCI slot, and has a Locking Lever.
Located in-between the PCI slots, and the Processor.
Latest technology. Started as PCI-Express 1.0, went to 1.1, then 2.0, then 2.1
Is now at PCI-Express 3.0
Longer than a PCI slot. Colors vary. Has a Locking Lever.
ONLY a PCI-Express x16 slot is used for a graphics card.
Not a PCI-Express x1 slot. (Or PCI-Express x4 slot)
That is the best I can do, until you post the Product Number in a Comment.
This is located on the back of your desktop computer, next to the Windows product key, or up on the side of the tower.
White Service Tag. P/N = Product Number
S/N = Serial Number. DO NOT give out the serial number on a public forum )
For additional questions please post in a Comment.