title: Will i use the power of GPU when using a OpenGL program?
body: <p>I've got a pretty old ATI HD 3400 video card , which have no support of OpenCL , so i'm wondering if i can actually play around with OpenGL libraries provided by ATI catalyst driver ?</p>
  
  <p>If my algorithm is running in <code>glutDisplayFunc ( displayFunc )</code> , that is in <code>displayFun ()</code> , is it actually costing CPU power or GPU power ?</p>