Diamond Viper V550

The RIVA TNT (codename NV4) is a 2D/3D graphics chip and was the factor to get nVidia in the 3D business.

RIVA is an acronym for Real-time Interactive Video and Animation accelerator and TNT refers to the chip's ability to work on two texels at once (TwiN Texel).

With this card nVidia hoped to match the Voodoo2 but didn't succeed. The chip didn't meet expectations and was running quite hot. To get it reliable nVidia reduced the initial clock frequenties which also lowered performance.