The images you see on your monitor are made of tiny dots called pixels. At most common resolution settings, a screen displays over a million pixels, and the computer has to decide what to do with every one in order to create an image. To do this, it needs a translator -- something to take binary data from the CPU and turn it into a picture you can see. Unless a computer has graphics capability built into the motherboard, that translation takes place on the graphics card.
A Graphics Card is a piece of computer hardware that produces the image you see on a monitor. The Graphics Card is responsible for rendering an image to your monitor, it does this by converting data into a signal your monitor can understand.
A video card expansion slot is where the card connects to the motherboard. In the picture above, the video card is inserted into the AGP expansion slot on the computer motherboard. Over the development of computers, there have been several types of expansion slots used for video cards. Today, the most common expansion slot for video cards is PCIe, which replaced AGP, which replaced PCI, which replaced ISA.
Yes. Both AMD Radeon (utilizing CrossFire) and NVIDIA GeForce (utilizing SLI) cards are capable of running two or more video cards together.
Press the Windows key+R, and in the dialog box that opens, type 'dxdiag.exe’ (without quotes). Then, once the tool opens (if it asks for anything, select any option, it won't matter much), go to the 'Display’ tab. There, you will find the details of you graphics card. If the name of the graphics card has the word 'Intel’ in it, it is an integrated card. If it has Nvidia or AMD, it is a dedicated card.
Not all computers need a graphics card and it's completely 100% possible to get by without one – especially if you're not gaming. But, there are some stipulations. Since you still need a way to render what you see on your monitor, you'll need a processor with an Integrated Graphics Processing Unit (or iGPU for short).
Getting a high end graphics card will last you about 4-5 years as long as you use it right (OC Correctly etc.) Yours I would give maybe that long if your okay with playing on the lowest graphic settings. If you want it to last longer it's not all about the build, it's about the quality of your GPU.
Wet the lint-free cloth with some alcohol, then wipe the surface of the GPU chip slowly to remove and dirt, grime and glue residue. Clean the rear surface of the GPU on the video card with the lint-free cloth and alcohol.