The Service partition helps integrate all of the different parts of ASCI Red together. It provides a scalable host for users, and it is used for general system administration. The I/O Partition provides a file system and network services, and the Service partition is made up of the log-in screens, tools for application development, and utilities for network connections. The Compute partition contains nodes that are designed for floating point performance. This is where the actual computing takes place. Every one of the compute nodes accommodated two 200 MHz Pentium Pro processors, each with a 16 KB level-1 cache and a 256 KB level-2 cache, which were upgraded later to two 333 MHz Pentium II OverDrive processors, each with a 32 KB level-1 cache and a 512 KB level-2 cache. According to Intel, the ASCI Red Computer is also the first large scale supercomputer to be built entirely of common commercially available components.