I read from a website, it says there are 3 main types which are PCI-E (Express), PCI, and AGP. But what makes me unsure about this is that I found that Wikipeida wrote there many more other types. Take a look at related links below.
//Correction
AGP is use only for graphics.
Only graphics cards are inserted into a PCIe x16 expansion slot.
PCIe
PCIe
PCI or PCI Express
AGP is a short for accelerated graphics port. Old computers (well - this depends on how long you have been involved with computers ;-)) have usually one AGP slot which is intended for the use of a graphic adapter. For more information you might want to consult Wikipedia
Yes, technology has changed quite a bit. Really old graphics card use PCI expansion slots, fortunately most motherboards still have PCI slots. Another expansion slot was invented called AGP (Accelerated Graphics port) used solely for graphics cards. This type of slot is rarely ever found on modern computers. Now graphics cards are installed into the PCI-Express x16 slot.
You just have to find out if its a PCI, AGP or PCI-E slot graphics card, go to the store, buy one that matches your slot type. If your graphics card is intergrated you can download a program called Everest home edition and find out what slot it is.
PCI, PCIe.
Take a look at your system motherboard to see if it has an AGP or PCI Express card slot (it will be the topmost expansion slot on the motherboard--your monitor should be connected to the card currently sitting there). This will tell you which type of video card is available to you.
PCI, PCIe.
A Graphics card - AGP stands for Accelerated Graphics Port
PCI Express