Just like this card but with 16MB RAM in total and higher rated (7NS instead of 8NS) RAM chips. Usually the cards are clocked identical from factory but having faster chips will allow better overclocking. > Read more

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I have three Diamond Viper V550 cards and despite having the same name there are slight differences between them:

The card on the page you're looking at is equipped with 16MB 8NS RAM and features an TV-out connector. I also have an 8MB version without TV-out and a 16MB version that doesn't have TV-out as well but is equipped with faster 7NS RAM so it might have a better overclock potential. > Read more

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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. > Read more