HP Z540 Digital Entertainment Center Intel Pentium 4 processor 530 with HT Technology (3.0 GHz) 512MB of PC3200 DDR SDRAM (expandable to 2GB) 160GB 7200RPM SATA HDD 16x Double Layer DVD+/-RW Drive - up to 2.4x DL DVD+R, 16x DVD+R, 8x DVD-R, 4x DVD-RW, 4x DVD+RW, 40x CD-R, 24x CD-RW, 16x DVD-ROM, 40x CD-ROM ATI RADEON X300 SE 16x PCI-Express Graphics Card with 128MB DDR memory