HP Pavilion Slimline S3750F Desktop PC 2.1 GHz AMD Phenom X4 9450 quad-core Processor 4 GB RAM (max) 640 GB hard drive, Blu-ray Disc playback and DVD-RW/CD burning Windows Vista Home Premium with SP1 (64-bit version) Nvidia GeForce Go 9500 GS video card with up to 2558 MB of available memory