Memory Type 333- and 400-MHz DDR SDRAM 128-MB, 256-MB, 512-MB, or 1-GB non-ECC Maxium memory small mini-tower computer: 4 GB Computer Information Chip set Intel 865G Data bus width 64 bits Address bus width 32 bits Interrupt levels 24 BIOS chip 4-MB NIC Gigabit integrated network interface with ASF 1.0 support as defined by DMTF Capable of 10/100/1000 communication Hard drive dual-channel Serial ATA, supporting one device per channel Ultra ATA/100 dual-channel bus master EIDE, supporting one or two devices per channel, depending on your computer Expansion Bus Bus type PCI 2.2 AGP 3.0 USB 2.0 Bus speed PCI: 33 MHz AGP: 66 MHz