How to get an nvidia control panel?

I have an Nvidia geforce 9500 gs card on Ubuntu 13.04. I downloaded the driver already but cannot change performance settings and my streaming video is very choppy. I can't even find System/administration/hardware drivers; it doesn't exist.

To open the settings menu to allow installing additional proprietary drivers go to the "System Settings..." menu on the top panel. Choose "Software and Updates"

In the following window select then "Additional Drivers" tab:

This will let you select available stable proprietary drivers for your graphics card (above shown for a virtual machine).

On selecting the recommended "Nvidia Current" driver it will install on your system. Nvidia settings can then be accessed most easily from the Dash:

You run nvidia-setings as root. Depending on your version of Ubuntu, run

gksu nvidia-settings