HP Compaq dc5850 AMD Athlon Dual-Core 4450B 1G/160G DVD-ROM WVST Bus Small Form Factor PC. Processor model: AMD Athlon Dual-Core 4450B, Processor front side bus: 2000 MHz, Motherboard chipset: AMD 780V. Internal memory: 1 GB, Maximum internal memory: 8 GB, Memory slots: 4 DIMM. Hard drive rotational speed: 7200 RPM. Discrete graphics adapter model: Microsoft Windows Vista, Microsoft Windows XP Professional, Microsoft 2000, Maximum graphics adapter memory: 8-256 MB. Optical drive type: DVD-ROM