1. A graphic data processing apparatus, comprising: a CPU having at least one core; a GPU configured to process graphic data; a usage level checking unit configured to check a usage level of the CPU and/or a usage level of the GPU; and a control unit configured to compare the checked usage level of the CPU with a usage level reference of the CPU and/or to compare the checked usage level of the GPU with a usage level reference of the GPU, to allow the graphic data to be processed in parallel by the CPU and the GPU or only by the GPU according to the comparison results.