Graphics Onboard or PCIe

[Skofab]

My wife has a very modest setup which includes a GA-F2A88XM-DS2 M/Board.

This has a ATI Radeon HD8470D onboard graphics system. I have reason to believe that this is not the best system due to ATI driver problems etc, and the quality of the picture on monitor is somewhat washed out..
I am tempted to fit a nVidia PCIe card to replace the above. Am I correct that the fitment of such a card will be recognised by the bios, and that the PCIe slot will override the present on-board arrangement. At present the bios integrated graphics setting is at 'Auto'
Thanks in advance for your help.

Skofab

[shadowsports]

Greetings,
Are you sure its not the monitor, cable or your color calibration settings?  If you decide to replace the onboard graphics with a stand alone GPU, ensure you buy one of the same generation for your CPU.  There is no need to spend money for a higher end card if your processor can't take advantage of it. 

Using the (AUTO) setting for first display device is also acceptable. Your choices are auto, disabled, force.   If you have an issue, just change it to Disabled unless you plan on using the both on-board and stand alone GPU.