HP xw4550 AMD Opteron 1214 2.20GHz 1GB/160GB DVD+/-RW SM WVST Bus Workstation, xw. Processor clock speed: 2200 MHz, Processor family: AMD Opteron, Processor front side bus: 1000 MHz. Internal memory: 1024 MB, Internal memory type: DDR2, Memory slots: 4x DIMM. Hard drive capacity: 160 GB, Hard drive interface: Serial ATA, Hard drive rotational speed: 7200 RPM. Optical drive type: DVD Super Multi. Display diagonal: 431.8 mm (17 ")