3dfx was a significant player in retro PC gaming hardware, known for the Voodoo graphics card, which transformed the gaming landscape and advanced graphics technology. Ross Smith, a founder of 3dfx, noted the card's success was largely due to the 'Quake effect,' as the game demonstrated the Voodoo card's 3D acceleration capabilities. The Voodoo functioned as a co-processor alongside a 2D card, allowing the CPU to handle other tasks. 3dfx faced legal challenges with Nvidia over patent infringements in the late '90s and early 2000s, and after its bankruptcy, Nvidia acquired many of its assets, contributing to Nvidia's future successes. The Voodoo cards did not include a VGA output, a decision influenced by limited design experience and a focus on profitability and compatibility with a smaller number of games.