Alienware heeft een white paper report gepubliceerd over de PGC (Parallel Graphics Configuration) Technologie, die door Metabyte ontwikkeld is en waarop Alienware een licentie genomen heeft. Hier heb je de belangrijkste info, nl hoe het werkt het:
First of all, the Wicked3D PGC solution is not "SLI" at all. SLI is an acronym for "Scan Line-Interleaving", the idea of using 2 video cards in a single system, with one card responsible for rendering the even scanlines and the other for the odd scanlines. The same triangle data is sent to both cards. Theoretically, this would allow for twice the raw performance as measured by the pixel fill-rate. The theoretical performance benefit, as measured by triangles processed per second, however, should remain the same. This is the familiar SLI technique that is available on our Wicked3D featuring Voodoo2 product as well as other 3Dfx Voodoo2 based products.
On our Wicked3D PGC, however, the familiar term SLI is used only to represent the idea of using multiple video cards in a single system to work together and render a single image. The technique used to do this is not "Scan Line Interleaving", each card is not rendering either the even or odd scanlines. Instead, Wicked3Dís drivers intelligently divide the entire display area into a top region and a bottom region. Each card is then responsible for the rendering of one of those regions. Unlike Voodoo2 SLI, different triangles are sent to each card. This means that theoretical performance, in terms of both the pixel fill rate as well as the number of triangles processed per second, can double when using two Wicked3Dís in PGC mode. The bottleneck in rendering performance is alleviated and potential triangle processing capability is increased for future CPUs. Testing indicates that actual game performance increases using PGC can be dramatic.
Verder vind je er o.a. een paar benchmarks. Check 't hier.