My freind and i were talking the other day (we both know very little about computers, but im trying to learn ) and he was saying that he thought u could put two video cards on one pc. He also stated that you could sorta mix and match i told him he really had no clue what he was talking about and there was no way you could ever put a radeion with a nividia even if you could put two cards on one comp. was he right? it dosnt really make sense to me. I thought you could just have one

Actually you can put two video card in one computer regardless of the brand. I use to setup a multi-video card with mulitiple monitor before, but now there are devices that almost replaced this function.. a year ago ATEN manufactured a so call KVM switch wherein you can put 4 monitors with one display each or all of them having one display only... but this port was in DVI type.

Actually you can do that, put two video card in one cpu, I did it before but you know you need to configure both, or else only one will work... I forgot the configuration becuase I've done it once... but I know it is inside the bios setup...

You know those games with multiple monitor? some of them uses more than 1 video card that is why the display can as many...

Since the release of Windows 98SE and higher, you are allowed to use two video cards without installing special hardware or software. I would suggest that one would be AGP and the other would be PCI. Although I have seen two PCI video cards, it would be waste of perfectly good AGP slot when not used. You do not need to setup in BIOS. After installing all drivers, your OS will recognize that there are two video cards and it will act accordingly. The only time you are going to setup in BIOS is to set the default display (AGP or PCI). Once the OS boots up, right click to access your display function and select setting tab. It's self explanatory.

Just remember that when you are calling for video overlap, your primary video will be the only output--meaning some games will only show up in one monitor.

I currently have two 19inch monitors to aid me in video editing production and it works wonders (no more cramming 7 menu windows in one monitor).

I remember when I assembled my computer I used another AGP Video card. There is a built-in video in the motherboard, which would be needed to setup inside bios to set the primary as you said, Is it possible that instead of using AGP and PCI I used the built-in and another AGP.. my setup before is working but the video on board will not work...

So far, all of brand named motherboards I have used that had built-in video, (Intel, ASUS, Gigabyte) they all allowed me to use AGP and built-in video. As I recall you have to enable the built-in video through BIOS. And don't forget to install built-in video's driver (that came with your motherboard) in order to have it functioning correctly.

If you don't count maybe one or two specialist motherboards all of them used to come with a single AGP slot which is used for the graphics card. Thus you can plug in only one. However, if you had a PCI graphics card for some reason, there would be nothing against installing that as well. Or if you had integrated graphics to your motherboard plus an agp slot. It would do you very little though, namely enable the addition of extra monitors.

There is no way you can increase the performance or anything. That was the case waay back, like ten years ago with the 3DFX Voodoo and Voodoo2 cards. Those were added to your existing card and you could even put two of them. They were solely for gaming though. Nvidia has revived that under the name SLR these days, using two PCI-Express cards you can get up to four monitors and use the two cards together to supercharge gaming performance.