Final answer:
To enable all features of a new video card, you should install the device driver from the manufacturer's website and then reboot the computer. If issues continue, reseating the card or contacting support may be necessary.
Step-by-step explanation:
If you have installed a new video card in your computer but are not able to access all its features, the most likely resolution is to install the device driver. Device drivers are software that tell your operating system how to communicate with the hardware. Without the correct drivers, some or all of the features of the video card may not function properly.
To install the device driver, you can usually find the necessary software on the manufacturer's website. Download the driver specific to your video card model and your operating system. Once the driver is installed, you may need to reboot the computer for the changes to take effect. If after installing the driver and rebooting the system the problem persists, then you might consider reseating the card or seeking technical support.