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PCIe Scaling: DiRT 2

PCI Express And SLI Scaling: How Many Lanes Do You Need?
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DiRT 2 falls between Crysis and CoD:MW2 when it comes to bandwidth dependence, suffering 16% and 4% performance losses when the GeForce GTX 480 is forced to x4 and x8 transfers, respectively.

The performance difference between x16 and x8 falls to 3% at 2560x1600, and DiRT2 is playable even at x4.

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