Originally posted by leehack
If you didnt have a graphics card in the PC, you would use the on-board graphics card thats actually included on the motherboard, this 'inbuilt' graphics card will output its signal to the 15pin connector on the motherboard, near the USB ports.
Other similar examples of this are sound and network cards.
Imagine you have a PC that has a network connector builot into the motheboard, in this case there is no need to install another network card.
Sound is probably a better example...
Nowadays, almost every motherboard in the world ships with built in soundcard, but this sound card is normally pretty basic(as are on-board graphics cards), so many people upgrade the sound capability of their rig by installing a Soundblaster with 7.1 functionality.
When they do this, it renders the sound card built into the motherboard unnecessary. Therefore it wasnt worth buying a motherboard with it in the first place.
However, with sound, you dont really get the option as they all have it, but with graphics there is a wide selection of boards that either have or dont have inbuilt graphics.
When you are building a PC you make the choice at the very beginning... Will I install a graphics card? If the answer is yes, then you dont need a motherboard with on-board graphics. If the anser is no then you get a board with on-baord graphics.
One reason may be that boards without on-baord graphics tend to be marketed more at the higher end, and strangely paradoxically, boards without graphics card are more expensive than boards with. It probably is me being a bit anal, to be honest ive never bought a built PC in my life so this sort of thing could happen all the time and I wouldnt know about it. It just seems a bit illogical.
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