Due to the size and weight of the unit when loaded, I tested the Mini-Cluster at Appro's headquarters in Milpitas, Calif. The blades I tested had dual Opteron 246 CPUs and 4GB RAM each. I ran some Windows 2000 Server and Linux benchmarks to compare processor power and overall system speed with recently reviewed Opteron 1U servers. Processor benchmarks and network I/O were comparable to other Opteron 246 systems tested, while disk I/O was within 2 percent of previously tested ATA-based systems.