One Intel® Xeon 3.06GHz Processor (512KB Level 2 ECC Cache) up to two supported ServerWorks GC-SL Chipset with 533-MHz Front Side Bus Support for up to five 1-inch Wide Ultra320 SCSI Non Hot Plug Hard Drives 256MB PC2100MHz Registered DDR SDRAM DIMM Memory up to 4GB maximum (4 DIMM sockets) Four total PCI slots 3 available: 64-Bit-33MHz PCI Ships standard with the Proliant Essentials Foundation Pack (including SmartStart and Insight Manager) and supports other Proliant Essentials tools like the Rapid Deployment Pack