Apple Xserve G5 is the classiest 1U server with dual 64-bit processors. At speeds of up to 2.0GHz, Xserve G5 packs in the same G5 processor that powers the world's third fastest supercomputer cluster.The advanced G5 architecture provides an industry-leading front-side bus dedicated to each CPU as well as plenty of DDR SDRAM with ECC protection. That's room enough to hold entire data sets in memory, whether you're processing nanoscale electronics, rendering movies or caching websites. In addition, Xserve G5 features dual Gigabit Ethernet on the motherboard, which, combined with the point-to-point system controller, means you won't get contention between your network traffic and other I/O.What you will get is performance rivaling much bigger iron. No matter how you stack it up, Xserve G5 knocks out the competition in everything from pure processing power to I/O throughput. For example, the Xserve G5's two double-precision floating-point units let it perform linear equations in LINPACK 8 percent faster than 3.2GHz Xeon-based servers and 50 percent faster than the 2GHz Opteron-based server. The machine simply blasts past others in its class that cost almost twice as much.