The Sun Blade X8400 server modules provide significant computational, memory, and I/O density in a compact, efficient, and flexible package. Each Sun Blade X8400 server module provides four sockets for 800 Series AMD Opteron dual core processors, yielding eight high-performance processor cores per server module. The Sun Blade X8400 server module provides from two to 20 times more I/O throughput than any other server module and up to three times the I/O options, allowing modular servers to be used for applications that require significant I/O throughput.