Actidata actiNAS 4000. Total storage capacity: 4000 GB, Hard drive capacity: 1000 GB, RAID levels: 0, 1, 3, 5. Memory type: DDR3, Internal memory: 2048 MB, Maximum internal memory: 8 GB. Processor model: E6300, Processor clock speed: 2800 MHz. Power requirements: 100 - 240 VAC, 50/60 Hz, Power supply: 450 W. Compatible operating systems: Microsoft WSS 2008