HP Smart Buy EliteDesk 705 SFF A6 Pro 7400B 4GB memory 500GB hard drive AMD Radeon R5 graphics DVD+-RW Win8.1 Pro with downgrade to Win7 Pro OPK13 Cyberlink HP Client Security suite embedded TPM 1.2 security module HP BIOSphere DASH 1.1 managability support DTS Studio Sound 2 PS/2 port one Serial Port three independent displays support standard standard (1 VGA and 2 Displayports 1.2) 3-3-3 waranty Toolless serviceability