Two Intel® Xeon Processors MP at 2.80GHz (2MB Integrated Level 3 cache) up to four supported 2GB 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 Two 800W Power Supply (low line or high line) 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.