Specifications

CHAPTER 1
Introduction
Comparison With Power Macintosh 5400 Computer 3
■ Processor bus: 64-bit wide, 40 MHz, supporting split address and data tenures.
■ Standard Macintosh I/O ports: two serial ports, sound input and output jacks, a SCSI
port, and an ADB port.
■ GeoPort: supported on both the modem and printer port.
■ PCI-based communications slot: a 112-pin connector accepts an optional modem or
ethernet interface. This is the same type of communications slot found in the Power
Macintosh 5400 computer.
■ PCI card expansion slots: accepts two 7-inch PCI cards; 15 watts maximum on each
card.
■ Power switch: soft power controlled from keyboard and remote control.
■ Voltage switch: allows selection of either 115 for voltages of 100-130 V or 230 for
voltages of 200-230 V depending on the voltage you will be connecting to. The voltage
selection must be set manually.
■ Case design: the Macintosh Performa 6400 has a new tower case design with an easy
to remove front panel and expansion bay panel. The tower case also incorprates a
built-in subwoofer.
■ Fan speed control: the speed of the fan is thermally controlled and is automatically set
to the lowest possible speed to minimize noise. The fan speed varies according to the
temperature inside the enclosure.
■ Energy saving: sleep, startup, and shutdown scheduling can be controlled with the
Energy Saver control panel.
Comparison With Power Macintosh 5400 Computer 1
The Macintosh Performa 6400 computer uses a main logic board nearly identicle to the
logic board in the Power Macintosh 5400. Table 1-1 compares the features of these
computers.
Table 1-1 Comparison with the Power Macintosh 5400 computer
Features Power Macintosh 5400 Macintosh Performa 6400
Processor type PowerPC 603e PowerPC 603e
Processor speed 120 MHz or faster 160 MHz, 180 MHz, and
200 MHz
Cache 256 KB L-2 cache (optional) 256 KB L-2 cache (optional)
Amount of RAM 8 MB–136 MB 16 MB–136 MB
RAM expansion 2 168-pin DIMMs 2 168-pin DIMMs
Memory bus 64 bits, 40 MHz 64 bits, 40 MHz
continued