Microprocessor
Microprocessor type	Intel® Pentium® 4 microprocessor (2.4, 2.6, 2.8, 3.0, 3.2, and 3.4 for 800 FSB, and 2.4, 2.66, 2.8, and 3.06 for 533 FSB)
L1 cache	8 KB
L2 cache	512-KB or 1-MB pipelined-burst, eight-way set associative, write-back SRAM
L3 cache	2 MB NOTE: L3 cache is available only with Intel Pentium 4 Extreme Edition processors that support Hyper-Threading technology.

Memory
Type	DDR 333 or 400 (non-ECC)
Memory connectors	four
Memory capacities	128-, 256-, 512-MB, and 1-GB non-ECC
Minimum memory	256 MB
Maximum memory	4 GB NOTE: See "Addressing Memory with 4-GB Configurations" for the amount of memory available to the operating system.
BIOS address	F8000h

Memory
Type	400- and 333-MHz DDR SDRAM
Memory connectors	four
Memory capacities	128-, 256-, or 512- non–ECC
Minimum memory	256 MB
Maximum memory	2 GB ?! (i think this is a typo; there should be no difference)
BIOS address	F0000h

Computer Information
System chip set	Intel 875P
DMA channels	eight
Interrupt levels	15
BIOS chip	4 Mb
NIC	integrated PCI Network Interface
System clock	533- or 800-MHz data rate

Computer Information
Chip set	Intel 875P
DMA channels	eight
Interrupt levels	24
BIOS chip	4-Mb
NIC	integrated PCI network interface
System clock	533- or 800-MHz data rate

Video
Type	AGP 8X

Video
Type	AGP 8X

Audio
Type	Analog Devices AD1980 AC97 Codec NOTE: This audio type is present only on computers with integrated sound capabilities.

Expansion Bus
Bus types	PCI and AGP
Bus speed	PCI: 33 MHz AGP: 133 MHz
AGP
connector	one
connector size	172 pins
connector data width (maximum)	32 bits
bus protocols	8x/4x/2x modes at 1.5 V
PCI
connectors	four
connector size	120 pins
connector data width (maximum)	32 bits

Drives
Externally accessible	two 3.5-inch bays two 5.25-inch bays
Available devices	ATA-66 or ATA-100 Ultra DMA hard drive, serial ATA drive, CD drive, Zip drive, DVD drive, CD-RW drive, DVD/CD-RW combo drive, and DVD+RW drive
Internally accessible	two bays for 1-inch–high hard drives

Connectors
Externally accessible:
Serial	9-pin connector; 16550C-compatible
Parallel	25-hole connector (bidirectional)
Video	15-hole connector
Network Adapter	RJ45 connector
PS/2 (keyboard and mouse)	6-pin mini-DIN connector
USB	two front-panel and six back-panel USB 2.0–compliant connectors
5.1 Audio	five connectors for line-in, line-out, microphone, surround, and center/Low-Frequency Effects (LFE) channel; one front panel connector for headphones NOTE: These audio connectors are present only on computers with integrated sound capabilities.
System board connectors:
Primary IDE channel	40-pin connector on PCI local bus
Secondary IDE channel	40-pin connector on PCI local bus
Serial ATA drive	two 7-pin connectors
Floppy drive	34-pin connector
Telephony (ATAPI)	4-pin connector
CD Audio (ATAPI)	4-pin connector
Fan	3-pin connector

Controls and Lights
Power control	push button
Power light	green light on power button—blinking green in sleep states; solid green for power-on states
Hard-drive access light	green
Link integrity light (on integrated network adapter)	green light for 10-Mb operation; orange light for 100-Mb operation
Diagnostic code lights	four bicolor (amber and green) located on back panel

Power
DC power supply:
Wattage	250 W or 305 W
Heat dissipation	853 BTU (fully-loaded computer without monitor)
Voltage (see the safety instructions in your Owner's Manual for important voltage setting information)	90 to 135 V at 50/60 Hz; 180 to 265 V at 50/60 Hz; 100 V at 50/60 Hz for Japanese computers
Backup battery	3-V CR2032 lithium coin cell

Physical
Height	42.5cm (16.7 inches)
Width	18.1 cm (7.13 inches)
Depth	44.7 cm (17.6 inches)
Weight	12.7 kg (28 lb)

Environmental
Temperature:
Operating	10º to 35ºC (50º to 95ºF) NOTE: At 35ºC (95ºF), the maximum operating altitude is 914 m (3000 ft).
Storage	–40º to 65ºC (–40º to 149ºF)
Relative humidity	20% to 80% (noncondensing)
Maximum vibration:
Operating	0.25 G at 3 to 200 Hz at 1/2 octave/min
Storage	0.5 G at 3 to 200 Hz at 1/2 octave/min
Maximum shock:
Operating	bottom half-sine pulse with a change in velocity of 50.8 cm/sec (20 inches/sec)
Storage	23-G faired-square wave with a velocity change of 508 cm/sec (200 inches/sec)
Altitude:
Operating	–15.2 to 3048 m (–50 to 10,000 ft) NOTE: At 35ºC (95ºF), the maximum operating altitude is 914 m (3000 ft).
Storage	–15.2 to 10,670 m (–50 to 35,000 ft)

Expansion Bus
Bus type	PCI and AGP
Bus speed	PCI: 33-MHz AGP: 133-MHz
AGP
connector	one
connector size	172 pins
connector data width (maximum)	32 bits
bus protocols	8x/4x/2x modes at 1.5 V
PCI
connector	four
connector size	120 pins
connector data width (maximum)	32 bits

Drives
Externally accessible:	one 3.5-inch drive bay three 5.25-inch drive bays
Available devices	ATA-100 Ultra DMA hard drive, serial ATA drive, CD drive, DVD drive, RAID
Internally accessible:	three 3.5-inch drive bays

Connectors
External connectors:
Serial	two 9-pin connectors; 16550C-compatible
Parallel	25-hole connector (bidirectional)
Network adapter	10/100 Ethernet connector
PS/2 (keyboard and mouse)	6-pin mini-DIN
USB	two front-panel and six back-panel USB 2.0–compliant connectors
headphones	one front-panel connector
System board connectors:
Primary IDE drive	40-pin connector
Secondary IDE drive	40-pin connector
Floppy drive	34-pin connector
Fans (3)	3-pin connector
I/O Panel	34-pin connector
Serial ATA (2)	7-pin connector
IEEE 1394	4-hole, unpowered connector

Controls and Lights
Power control	push button
Power light	green light on power button—blinking green in sleep state; solid green for power-on state
Hard-drive access light	green
Link integrity light (on integrated network adapter)	green light for 10-Mb operation; orange light for 100-Mb operation
Activity light (on integrated network adapter)	yellow blinking light
Diagnostic lights	four lights on the back panel

Power
DC power supply:
Wattage	460 W
Heat dissipation	1000 BTU/hr
Voltage (see the safety instructions in your Owner's Manual for important voltage setting information)	fixed-voltage power supply—110 V at 50/60 Hz manual selection and auto-sensing power supplies—90 to 135 V at 50/60 Hz; 180 to 265 V at 50/60 Hz; 100 V at 50/60 Hz for Japanese computers
Backup battery	3-V CR2032 lithium coin cell

Physical
Height	49.1 cm (19.3 inches)
Width	22.2 cm (8.7 inches)
Depth	48.8 cm (19.2 inches)
Weight	19 kg (42 lbs)

Environmental
Temperature:
Operating	10° to 35°C (50° to 95°F) NOTE: At 35°C (95°F), the maximum operating altitude is 914 m (3000 ft).
Storage	–40° to 65°C (–40° to 149°F)
Relative humidity	20% to 80% (noncondensing)
Maximum vibration:
Operating	0.25 G at 3 to 200 Hz at 0.5 octave/min
Storage	0.5 G at 3 to 200 Hz at 1 octave/min
Maximum shock:
Operating	bottom half-sine pulse with a change in velocity of 20 inches/sec (50.8 cm/sec)
Storage	nonoperating (half-sine pulse) 105 G, 2 ms nonoperating (faired-square wave) 27 G with a velocity change of 508 cm/sec (200 inches/sec)
Altitude:
Operating	–15.2 to 3048 m (–50 to 10,000 ft)
Storage	–15.2 to 10,668 m (–50 to 35,000 ft)