HP ProLiant SE2170s HP Project Moonshot and the Redstone Development Server Pl - Page 7

Figure 5: The Calxeda EnergyCore SoC has a typical power rating of 5W and includes its own Ethernet controller, network fabric switch, and management co-processor. Source: Calxeda Calxeda EnergyCore SoC L2 cache Memory controller 4 GB DRAM EnergyCore Management Controller ARM ARM ARM ARM I/O Controllers Ethernet, PCIe, SATA, SD EnergyCore Fabric Switch SoC Power: 5W DIMM Power: 1 W The network supports 10 Gb Ethernet using an integrated fabric switch. By reducing the need for expensive centralized switches, the embedded network fabric overcomes the challenge of interconnecting thousands of server nodes in a single chassis by conventional methods. The embedded mesh fabric lets you connect nodes in a variety of redundant topologies. The integrated management capability supports common systems management protocols such as IPMI 2.0. It supports several remote management scenarios, including a remote console to access the SoC through a Serial-over-LAN connection. Each SoC is a separate server running its own OS instance. The SoC typically operates at 5 W of power and uses about 0.5 W when idle. If you add one 4 GB DIMM, it consumes about 1 W more. Quad-core processor subsystem The Redstone Development Server uses the quad-core Calxeda ECX-1000 EnergyCore processor subsystem, based on ARM 32-bit cores. The quad-core processor subsystem includes server-grade features such as an integrated ECC memory controller supporting DDR3 memory and a shared 4 MB L2 cache with ECC. The processor subsystem has the following characteristics: • Core frequency ranges of 1.1-1.4 GHz • Individual power domains per core to minimize overall power consumption • A fully IEEE-754 compliant floating point unit (FPU) with single- and double-precision operations • NEON® technology extensions for multimedia and SIMD processing • Integrated 4 MB shared L2 cache with ECC • Integrated memory controller - 72-bit data path with ECC - DDR3 (1.5 V) and DDR3L (1.35 V) at 800/1066/1333 MHz 7