XNA on graphics card -

How can I program graphics with XNA on a graphics card?

(How do I get a workload?

Explained in a very simple way:

All graphics are automatically drawn by the graphics card. XNA does not have any software renderer mode.

The way XNA is set to have the highest geometry is the graphics card versatax Buffer objects have been moved.

In short: If you want to work on your data, While this is on the graphics card, fixed pipeline estimation or shader is applied to the data by the graphics card. Use the top and pixel shaders.

Edit:

You should also check the details of the graphics pipeline to understand how the graphic card works.