Why are dual video cards needed?

Answer 1

They're not necessary if you have the correct hardware, however many people use multiple cards for multiple video displays.

Answer 2

Dual video cards are not "needed", but for games and applications that are graphically intense there is a way to do it. This technique is something called Scalable Link Interface, or SLI, that NVIDIA came up with. Essentially you have two NVIDIA cards installed, but together they produce one video output. It essentially takes the abilities of both cards and combines them together to make a very powerful compound GPU.

And just so everyone knows you dont have to have separate video cards to use two monitors. In fact, there is no operating system out there that supports two separate video out signals from two separate graphics cards.

Answer 3

multiple video cards allow you to have multiple displaying power. They are also used when you need to multi task between graphing software and/or gaming software. Some people will dedicate their more powerful video card to where big graphing power is needed. The other card they use to check e-mail, go into a chat room, or personal work. Computers will only go as geeky as you take them.

Answer 4

for faster video. you would use two video cards so that both work at the same time to work the video faster, a.k.a. SLI. you can run two monitors with one video card if you buy the right video card.

Answer 5

To run graphics in sli or to run multiple (2 or more) monitors,

Answer 6

Gives you more "real estate" on your desktop to move stuff around, run two programs at once, etc.

Answer 7

for more than one monitor

Answer 8

no