Q. Define Advanced Graphics Port?

AGP signify Advanced (or Accelerated) Graphics Port. It's a connector standard defining a high speed bus connection between the microprocessor, PC video system and main memory.  It is an improvementof PCI interface. AGP uses conceptionslike pipelining to allow powerful 3-D graphic accelerators to function when used in conjunction with fast processors.  AGP employs three powerful innovations to attain its performance:  

• Pipelined Memory: Use of Pipelining eliminates wait states allowing fasteroperation.
• Separate Address and Data Lines.
• High speeds via a special 2X mode which allows running AGP at 133 MHz in place of default 66 MHz

Although AGP, the video board has a direct connection to microprocessor as a dedicated high speed interface for video. The system employs DMA (Direct Memory Access) to move data between framebuffer and main memory.  The accelerator chip employs main memory for execution of high level functions such as those used in 3-D rendering.