at one time there were many manufacturers of graphics accelerators, including: 3dfx interactive; ati; hercules; trident; nvidia; radius; s3 graphics; sis and silicon graphics. the market for graphics accelerators for x86-based systems is dominated by nvidia (acquired 3dfx in 2002), amd (who acquired ati in 2006), and intel (which currently produces only integrated gpus rather than discrete video cards).