Multiple Screens at the same time

Hi all,

I want 2 screens connecting on my pc (1 for flight sim and 1 for radar systems,gauge display,etc...) and use them together in flight.

But I've got only 1 port on my videocard to connect a screen.
So I was thinking...
If I buy something like an USB hub but for screens (so 2 cables connected to one hub and that hub connected on my videocard).
Does something like that exists?And iif it is and i use it,will my performance go less better or will it be thesame?

Greets

-NVIDIA GeForce PCX 5750
- Plug and play monitor
- 1024x768 pixels at 60 Hz in True Colors (32-bit)
- Open GL
- 512 ram
- 3.06 Ghz