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Dell™ OptiPlex™ 745 User's Guide

  Desktop Computer Specifications

Desktop Computer Specifications

Microprocessor
Microprocessor type	Intel® Pentium® 4, Pentium® D, Celeron®, or Core™ processor
Internal cache	at least 512 KB eight-way set associative, write-back SRAM

Memory
Type	533, 667, or 800 MHz DDR2 SDRAM NOTE: 2-GB 800-MHz memory modules are not supported.
Memory connectors	4
Memory modules supported	256 MB, 512 MB, 1 GB, or 2 GB non-ECC
Minimum memory	dual-channel: 512 MB; single-channel: 256 MB
Maximum memory	At 533 or 667 MHz: 8 GB At 800 MHz: 4 GB
BIOS address	F0000h

Computer Information
Chipset	Intel® Q965 Express
Data bus width	64 bits
Address bus width	32 bits
DMA channels	eight
Interrupt levels	24
BIOS chip (NVRAM)	8 Mb
NIC	integrated network interface with ASF 1.03 and 2.0 support as defined by DMTF Capable of 10/100/1000 communication

Video
Type	Intel® Graphics Media Accelerator 3000 or PCI Express x16 graphics card

Audio
Type	ADI 1983 High Definition Audio
Stereo conversion	20-bit analog-to-digital; 20-bit digital-to-analog

Controllers
Drives	two SATA controllers supporting one device each

Expansion Bus
Bus type	PCI 2.3 PCI Express 1.0A SATA 1.0A and 2.0 USB 2.0
Bus speed	PCI: 133 MB/s PCI Express x16: 8 GB/s bidirectional speed SATA: 1.5 Gbps and 3.0 Gbps USB: 480 Mbps
Cards	half-length, full-height cards supported with optional riser-card cage
Default: no riser-card cage	low-profile cards supported
PCI
connectors	two
card size	low profile
connector size	120 pins
connector data width (maximum)	32 bits
PCI Express
connectors	one x16
card size	low profile
power	25 W maximum
connector size	120 pins (x16)
connector data width (maximum)	16 PCI Express lanes (x16)
Optional: full-height PCI Express riser-card cage	low-profile and full-height cards supported
PCI
connectors	two
card size	one low-profile card and one full-height card
connector size	120 pins
connector data width (maximum)	32 bits
PCI Express
connectors	one x16
card size	full-height
power	25 W maximum
connector size	120 pins (x16)
connector data width (maximum)	16 PCI Express lanes (x16)
Optional: full-height PCI riser-card cage	low-profile and full-height cards supported
PCI
connectors	three
card size	one low-profile card and two full-height cards
connector size	120 pins
connector data width (maximum)	32 bits

Drives
Externally accessible	one 3.5-inch drive one bay for optical drive or optional second hard drive
Internally accessible	one bay for a 1-inch-high hard drive

Connectors
External connectors:
Serial	9-pin connector; 16550C-compatible
Parallel	25-hole connector (bidirectional)
Video	15-hole VGA connector
Network adapter	RJ45 connector
Optional PS/2 with secondary serial port adapter	two 6-pin mini-DINs
USB	two front-panel and six back-panel USB 2.0–compliant connectors
Audio	two connectors for line-in/ microphone and line-out; two front-panel connectors for headphones and microphone
System board connectors:
SATA	two 7-pin connectors
internal USB	10-pin header for optional media card reader (3.5-inch bay device)
Floppy drive	34-pin connector
Serial	12-pin connector for optional second serial port card
Fan	5-pin connector
PCI 2.3	two 120-pin connectors
Front panel	40-pin connector

Key Combinations
<Ctrl><Alt><Del>	If you are running Microsoft® Windows® XP, brings up the Windows Security window; in MS-DOS® mode, restarts (reboots) the computer
<F2> or <Ctrl><Alt><Enter>	starts embedded system setup (during system start-up only)
<Ctrl><Alt><b>	automatically starts the computer from the network environment specified by the remote boot environment (PXE) rather than from one of the devices in the system setup Boot Sequence option (during system start-up only)
<F12> or <Ctrl><Alt><F8>	displays a boot device menu that allows the user to enter a device for a single boot (during system start-up only) as well as options to run hard-drive and system diagnostics

Controls and Lights
Power control	push button
Power light	green light — blinking green indicates a sleep mode; solid green indicates a power-on state. amber light — blinking amber indicates a problem with an installed device; solid amber indicates an internal power problem (see Power Problems).
Hard-drive access light	green
Link light	solid green light indicates network connection
Link integrity light (on integrated network adapter)	green light for 10-Mb operation; orange light for 100-Mb operation; yellow light for a 1000-Mb (1-Gb) operation
Activity light (on integrated network adapter)	yellow blinking light
Diagnostic lights	Four lights on the front panel. See Diagnostic Lights.
Standby power light	AUX_PWR on the system board

Power
DC power supply:	NOTE: Power consumption can be zero when the computer is unplugged.
Wattage	280 W
Heat dissipation	955 BTU/hr NOTE: Heat dissipation is calculated based upon the power supply rating.
Voltage	manual selection power supplies — 90 to 135 V at 50/60 Hz; 180 to 265 V at 50/60 Hz
Backup battery	3-V CR2032 lithium coin cell

Physical
Height	11.4 cm (4.5 inches)
Width	39.9 cm (15.7 inches)
Depth	35.3 cm (13.9 inches)
Weight	10.4 kg (23 lb)

Environmental
Temperature:
Operating	10° to 35°C (50° to 95°F)
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 50.8 cm/sec (20 inches/sec)
Storage	27-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)
Storage	–15.2 to 10,668 m (–50 to 35,000 ft)

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