One Intel® Xeon Processor MP at 2.00GHz (1MB Integrated Level 3 cache) up to four supported 1GB PC1600 Registered ECC SDRAM (standard) to 32GB (maximum) (4x1 interleaved and HP Advanced Memory Protection Technology Up to 4 internal hot-plug 1 hard drives supported 800W Hot Plug Redundant Power Supply (low line or high line)optional second redundant power supply Six total PCI-X slots (5 available) all 64-bit/100MHz (four hot plug slots available) (integrated on system board) (BBWC Enabler optional) Integrated Lights-Out (iLO) Standard management (integrated on system board) capabilities and industry leading ProLiant management tools