The NEC Express5800/320Lb-R. The 320Lb server, also available in a tower model, utilizes redundant blade-like modules (1U) to provide continuous availability and data integrity in the smallest footprint ever released for Fault Tolerant technology. Industry standard Intel Xeon processors, and Microsoft Windows-compatible applications are integrated on a compact, rack-mount (4U) or tower platform. This latest addition to the fault tolerant server line supports faster processors, faster I/O throughput and greater memory than previous models. A single 42U, 19-inch rack can hold up to eight 2-way fault tolerant servers.