I have heard that GPU’s are better at performing certain tasks than a CPU. My question is, how does a program tell a graphics card to process something instead of the CPU? Does the program talk to the GPU directly? Or does the CPU determine what to give the graphics card? It seems like the benefits of processing with a GPU would be negated somewhat if the CPU had to tell the GPU each instruction to process.

I have heard that GPU’s are better at performing certain tasks than a CPU. My question is, how does a program tell a graphics card to process something instead of the CPU? Does the program talk to the GPU directly? Or does the CPU determine what to give the graphics card? It seems like the benefits of processing with a GPU would be negated somewhat if the CPU had to tell the GPU each instruction to process.