The PowerNode3 is a single/dual 1 GHz PowerPC G4 high-end computing node featuring enhanced connectivity and reduced power consumption. It is designed for t applications requiring real-time data and signal processing, including sonar, radar, medical imaging and machine vision systems. The board features dual and single Motorola PowerPC G4 7457 processors running at 1 GHz, each equipped with a 2 MB L3 cache and 2 MB private SRAM, linked via a 133 MHz Avignon host bridge. Up to 1 GB onboard SDRAM is accessible at the local bus speed of 133 MHz. The new board provides twin PCI Mezzanine Card (PMC) slots (one 64-bit 66 MHz and one 32-bit 33/43 MHz). It is designed for connectivity, with an ALMA2e VME-PCI bridge that enables 2eSST data transfers at up to 180 MB/s for VME board interconnection. Dual Gigabit Ethernet interfaces and 4 asynchronous RS232/422/485 lines provide a range of high-speed networking and connection options.