HP xw4600 Intel® Core™2 Duo E6850 3.00GHz 2GB/500GB No Graphics DVD+/-RW WVST Bus Workstation, xw. Processor clock speed: 3 GHz, Processor front side bus: 1333 MHz, L2 cache: 4 MB. Internal memory: 2 GB, Internal memory type: DDR2, Maximum internal memory: 8 GB. Hard drive capacity: 500 GB, Hard drive interface: Serial ATA, Hard drive rotational speed: 7200 RPM. Operating relative humidity range: 8 - 85 %, Operating temperature range (T-T): 5 - 35 °C, Storage temperature range (T-T): 8 - 90 °C. Power supply: 475 W