Monday, June 25, 2007


What is SLI?

Scalable Link Interface is a method of parallel processing for computer graphics, in which two or more video cards can be linked to produce a single, more enhanced output.

Where was SLI technology first deployed on a commercial scale?

An initial version (dubbed ‘Scan Line Interleave’) was used by the US-based 3dfx in 1998, in the Voodoo 2 line of graphics accelerators.

When was the modern SLI introduced?

nVidia and ATi developed their own versions, that were rechristened ‘Scalable Link Interface’ in 2004.

How do the SLI versions differ?

In 3dfx’s SLI, the two connected cards compose a frame by rendering alternating horizontal lines of pixels. While the nVidia SLI splits the screen into two parts, one GPU rendering each, ATi’s solution breaks the screen into little squares.

Why does SLI have an edge over ordinary graphics cards?

By harnessing the processing power of two graphics cards, SLI-enabled systems can roughly— although not completely— double the performance of a single Graphics Processing Unit (GPU) configuration.

Who is the target audience?

With better image compositing and rendering, SLI-enabled systems are a must for the die-hard gamer. There’s a caveat: deep pockets required, as SLI systems need to be complemented with a highend motherboard and processor, as well a topnotch display unit.

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