This is the chip some moron finds on the motorola site and starts some ill informed thread about "G5 is here!!" every few months. Here's the specs, it sounds like one hell of a multi I/O controller chip: The MPC8540 integrates dual gigabit ethernet controllers, a 10/100 controller, a 64-bit PCI-X controller operating at up to 133MHz, a DDR memory controller, a 4-channel DMA engine, a multi-channel interrupt controller and a DUART serial interface. Designed as a SoC, the high level of integration enables simplified board design, low power consumption and an overall fast time to market solution for Motorola's customers. Seeing the Motherboard on the Xserver has gigabit, DDR, faster PCI slots than the G4 tower and 4 UDMA channels, it looks suspiciously like it could have this chip on the motherboard somewhere.