Four DIMM sockets.  Upgraded with one DIMM at a time.

Ships with a minimum of 8MB of RAM installed.

Requires 80ns memory.

This computer comes with 4096K ROMs and an Apple 1.44MB SuperDrive that uses high-density floppy disks and reads, writes, and formats Macintosh, Windows, MS-DOS, OS/2, and ProDOS disks.

Serial Port with the phone icon supports synchronous modems, with handshaking on both output and input supported.

Sound output is 16-bit stereo output.

This computer has an international power supply
Line voltage: 100 to 240 volts AC, RMS single phase, automatically configured 
Frequency: 50 to 60 Hz, single phase 
Power: 225 W maximum, not including display 
Energy Star compliant 

Interfaces
Three high-performance PCI expansion slots compatible with all PCI 2.0 specification-compliant cards (Note: These slots are not NuBus-compatible) - One Apple Desktop Bus (ADB) port for a keyboard, mouse, and other device 10BaseT and AAUI-15 Ethernet connectors Two DMA serial (RS-232/RS-422) ports compatible with LocalTalk and GeoPort cables, Single channel asynchronous SCSI interface which supports up to six SCSI devices (5MB/sec), 16-bit stereo sound input and output ports, DB-15 video port.