PCI Express And SLI Scaling: How Many Lanes Do You Need?
Are the most elaborate platforms really required to host the fastest GPUs, or can you get away with P55's lane-splitting scheme? As Nvidia’s latest graphics processors push 3D performance to new heights, we examine the interfaces needed to support them.
SLI Scaling: DiRT 2
DiRT 2 is slightly CPU-bound when using dual GeForce GTX 480’s at medium resolutions, gaining “only” 72% from the use of two cards at 1680x1050. Once again, GPU dependence increases as resolutions are increased, so the SLI advantage accelerates to 91% at 2560x1600.
DiRT 2 wasn’t very bandwidth-dependent with a single card, so the fact that the dual-x8 slot configuration trails the dual-x16 configuration by only 2-5% is no surprise here, either.
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