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Rick Rizner, John Goddard
The $3395 Poly 916NF4 is the first desktop system outfitted with two graphics cards that we've tested for the Top 15 Desktop PCs chart. It uses NVidia's scalable link interface (SLI) technology, which enables it to run two NVidia GeForce 6800 GT PCI Express graphics cards in parallel, splitting the graphics processing between them. Though you might expect SLI to improve gaming performance, the results in our tests were mixed: The frame rates were very high in Return to Castle Wolfenstein, but less impressive in our other video game: At 1280 by 1024 resolution and 32-bit color depth, the Poly 916NF4 generated 290 frames per second on Unreal Tournament--nearly double the average, but far short of the 413 fps generated by the $2835 Polywell 939N-FX55, which we tested with a single NVidia GeForce 6800 Ultra graphics card.
To be fair, these two test games don't take advantage of...