Difference between AGP and PCI Express
Key Difference: AGP was introduced to cater the increasing demands of 3D video cards. PCI Express is a modification of the standard PCI bus. PCI Express has the advantages of speed and versatility over AGP. PCI Express has replaced AGP as a video interface. They also differ in some of the physical characteristics. AGP stands for Accelerated Graphics Port. It is an interface specification that has been designed especially for the 3-D graphics; focusing on a faster and smoother display.