Adaptec Snap Server 4200 640Gb. Hard drive capacity: 640 GB, Hard drive interface: Ultra-ATA/133, Hot-swap hard drive bays: 4 x 80GB / 4 x 250GB. Memory type: DDR ECC, Internal memory: 256 MB. Processor model: Celeron. Data link protocols: TCP/IP, UDP/IP, Appletalk. Power requirements: 2.7A (RMS) - 115VAC, 1.4A (RMS) - 230VAC