Acer Aspire T660, 3 GHz, Intel® Pentium® 4, 631, 1 GB, 250 GB, Windows XP Media Center Edition Acer Aspire T660. Processor frequency: 3 GHz, Processor family: Intel® Pentium® 4, Processor model: 631. Internal memory: 1 GB, Internal memory type: DDR2-SDRAM. Total storage capacity: 250 GB. Discrete graphics card model: AMD Radeon X1550. Operating system installed: Windows XP Media Center Edition. Chassis type: Tower. Product type: PC