The Accelerated Graphics Port (also known Advanced Graphics Port, AGP in short) is a high-speed point-to-point channel for attaching a video card to a computer’s motherboard, primarily to assist in the acceleration of 3D computer graphics. AGP 1x: A 32-bit channel operating at 66 MHz resulting in a maximum data rate of 266 megabytes per second (MB/s), doubled from the 133 MB/s transfer rate of PCI bus 33 MHz / 32-bit; 3.3 V signaling.