Two, NVIDIA and ati.
ATi(Array Technology Industry) is a world-renowned manufacturer of display chips, equal to NVIDIA. Between 1985 and 2006, it was an important display chip company in the world, headquartered in Markham, Ontario, Canada, and became a part of AMD after being acquired by AMD in 2006 for a huge sum of 5.4 billion US dollars.
Two homes.
Graphics cards are mainly manufactured by NVIDIA (NVIDIA) and AMD (Supermicro Semiconductor), usually the graphics card using NVIDAI display chip is called N card, and the graphics card using AMD display chip is called A card.