The extended standard which raises the speed of the AGPbus whichis the videocardandthe private bus between main memory in 2 times. Early AGP (AGP 1x)we designate the timingof data sending and receiving as 2 times, we have increased in 533MB/s which also maximum data rate reaches 2 times that AGP 1x.Withthe recent advancedvideo card the data transfer quantity for 3D indication has increased extremely,these videocards are used with original efficiency, the minimum AGP 2x is needed. The function of AGP 2x is utilized,it is necessary for the video card and both of the motherboardto support AGP 2x.