How to Install a second graphic card

[Yaropolk]

Hello,

I already have an Asus ENGTX260, with a monitor (VW225D) and an old TV did.

Now I would like a second graphics card installed in the PC (Best Club 3D Nvidia GeForce 9500GT with 512MB DDR3) in order to continue these 2 monitors (VW192s) adapter.
If I connect both cards normally recognizes the pc will still be the primary.
What must I do to best card at the same time be able to use.
My motherboard is the ASUS P5n-E SLI and has 2 PCIe holly places and a "Single / Dual Video Card, which I turn on the board which may, however, no obvious reaction.
Other system: E6700 CPU, 4GB of DDR2 RAM, HDD should have no role to play.
OS Win XP 32bit.
Thank you in advance in advance

[SimonBoss]

It is impossible for two different video cards in one PC to work. The easy option for you would be as a second GTX260 SLI combined with your current run.
However, if you only connect to a second monitor, so you can monitor this at the second DVI port on your graphics card. (Your Graphic card has two connectors)
If a third SLI then you need ...

[Yaropolk]

hm, no longer knows where but I've read that Graphic card in a pc can run even from different manufacturers and different chips (ati and nvidia).

[SimonBoss]

So, different video cards (chips) do not.
When the manufacturer, it is not so bad. (MSI / HIS / ASUS / etc.) However, you can not even nVidia with ATI at the same time! The chip must be the same, that is with you always a GTX260!

Two times your desktop, which depending where you work only displays what you see on this open Desktop ? That is as far as I know impossible!