In computing, EXA is a graphics acceleration architecture of the X.Org Server (see also X Window System) designed to replace XAA (the XFree86 Acceleration Architecture)[1] and to make the XRender extension more usable, with only minor changes needed to adapt obsolete XFree86 video drivers written to use XAA; it was designed by Zack Rusin and announced at LinuxTag 2005[2] and first released with X.Org Server version 6.9/7.0.