The RIVA TNT, codenamed NV4, is a 2D, video, and 3D graphics accelerator chip for PCs that was developed by Nvidia. It was released in mid-1998 and cemented Nvidia's reputation as a worthy rival within the developing consumer 3D graphics adapter industry. The first RIVA TNT based card was released on June 15, 1998 by STB Systems: Velocity 4400. RIVA is an acronym for Real-time Interactive Video and Animation accelerator. The "TNT" suffix refers to the chip's ability to work on two texels at once (TwiN Texel).