HP dc5750 AMD Athlon 64 X2 4200+ 1GB/250G DVD+/-RW WVST Bus Small Form Factor PC. Processor model: 4200+, Processor front side bus: 2000 MHz. Internal memory: 1 GB, Maximum internal memory: 4 GB, Memory slots: 4 DIMM. Hard drive rotational speed: 7200 RPM. Maximum graphics adapter memory: 32-128 MB. Audio system: Integrated High Definition audio with Realtek 2 channel ALC260 codec