The ATI Mobility FireGL V3100 is a mobile workstation graphics card designed by ATI (now part of AMD). It was typically used in laptop computers and was aimed at professional applications such as CAD (Computer-Aided Design), 3D modeling, and other graphics-intensive tasks that required workstation-grade performance. The ATI Mobility FireGL V3100 Windows driver is a software package that enables your operating system (typically Windows) to properly communicate with the graphics card, allowing it to perform tasks like rendering graphics, driving displays, and running GPU-accelerated applications.