HP xw4550 AMD Opteron 1216 2.40GHz 1GB/250GB No graphics DVD+/-RW WVST Bus Workstation, xw. Processor family: AMD Opteron, Processor clock speed: 2.4 GHz, Processor front side bus: 1000 MHz. Internal memory: 1 GB, Internal memory type: DDR2, Maximum internal memory: 4 GB. Hard drive capacity: 250 GB, Hard drive interface: Serial ATA, Hard drive rotational speed: 7200 RPM. Graphic adapter: Radeon X1250. Audio system: High Definition Audio