Patent ID: 7375736

Claim:
A method for testing overclock frequency of VGA (Video Graphics Adapter), comprising: (A) receiving a new clock parameter of a GPU (Graphics Processing Unit) and a new memory clock parameter, which determine the operation of the VGA; (B) making use of the clock parameter of the GPU and the memory clock parameter received from step (A) to set up the VGA through a software approach so that the VGA is operating with the clock parameter of the GPU and the memory clock parameter; (C) calling three dimensional application program interfaces so that the VGA within the pre-defined time limit can execute to show a three dimensional picture in a window and output the three dimensional picture to the display connected to the VGA, wherein the step for executing showing of the three dimensional picture further comprises executing a lighting instruction, creating a mesh instruction, an object rotation instruction, a spherical warp instruction and a 3D immediate mode instruction so as to normally display the three dimensional picture; and (D) determining whether the three dimensional picture has been normally shown on the display, the clock parameter of the GPU and the memory clock parameter from Step (A) being accepted in case of being true and an original clock parameter of the GPU and an original memory clock parameter being restored in case being not true.