HP Compaq dc7800p Intel Core™2 Duo Processor E6550 1G/160G DVD+/-RW WVST Bus Ultra Slim Desktop PC. Processor model: E6550, Processor front side bus: 1333 MHz, Motherboard chipset: Intel Q35 Express. Internal memory: 1 GB, Maximum internal memory: 4 GB, Memory slots: 2x SO-DIMM. Hard drive rotational speed: 7200 RPM. Discrete graphics adapter model: Microsoft Windows XP Home, Microsoft Windows 2000 and Microsoft Windows Vista Enterprise, Maximum graphics adapter memory: 8-256 MB. Optical drive type: DVD Super Multi