One Intel? Xeon Processor MP at 2.20 GHz/2MB (up to 4 supported) ServerWorks Grand Champion-LE with 400 MHz Front Side Bus 1GB of 200MHz DDR, PC2100 2:1 interleaved memory (up to 12GB supported) Available slots: 2x64bit/100MHz PCI-X, 1x64bit/133MHz PCI-X Two 1" hot plug SCSI drive bays available 550W hot plug power supplies (1 required +1 for full redundancy) and hot plug fans included Ships standard with the ProLiant Essentials Foundation Pack, (including SmartStart and Insight Manager) and supports other ProLiant Essentials tools like the Rapid Deployment Pack