HP Compaq dc7600 Celeron D336 256M/40G CD-ROM WXP Pro Ultra Slim Desktop PC. Processor model: Intel® Celeron® D Processor 336, Processor front side bus: 533 MHz. Internal memory: 0.25 GB, Maximum internal memory: 3 GB, Memory slots: 3 DIMM. Hard drive rotational speed: 7200 RPM. Maximum graphics adapter memory: 128 MB. Audio system: Integrated High Definition audio with Realtek 2 channel ALC260 codec