HEXUS has noticed the answer ASUS gave about the 3rd PCI Express slot on an unrelased (P5N32 SLI) motherboard.  Much like ATI’s upcoming PPU, it does more that just process physics in games, it is also meant to be a co-processor for the CPU to dump many mathematical calculations onto.
“Nvidia is developing a standalone games physics processing card, motherboard maker Asus has let slip. Announcing a new mobo equipped with three PCI Express x16 slots, the Taiwanese firm said the third connector was specifically for “Nvidia’s upcoming Physics card”.

The revelation comes days after it emerged ATI will be likewise pitching its graphics chip technology as a co-processor for compute-intensive scientific and engineering applications, not just games physics.”

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