Dell OptiPlex GX1 Operator's manual

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Information in this document is subject to change without notice.
© 1998 Dell Computer Corporation. All rights reserved.
Trademarks used in this text: Dell, the DELL logo, and OptiPlex are registered trademarks of Dell
Computer Corporation; Microsoft, Windows, and Windows NT are registered trademarks of
Microsoft Corporation; 3Com and EtherDisk are registered trademarks of 3Com Corporation;
Intel, LANDesk, and Pentium are registered trademarks of Intel Corporation. Other trademarks
and trade names may be used in this document to refer to eitherthe entities claiming the marks
and names or their products. Dell Computer Corporation disclaims any proprietary interestin
trademarks and trade names other than its own.
____________________
Les informations de ce document sont sujettes à modification sans préavis.
© 1998 Dell Computer Corporation. Tous droits réservés.
Marques utilisées dans ce texte: Dell , le logo DELL et OptiPlex sont des marques déposées de
Dell ComputerCorporation; Microsoft, Windows, et Windows NT sont des marquesdéposées de
Microsoft Corporation; 3Com et EtherDisk sont des marques déposées de 3Com Corporation;
Intel , LANDesk et Pentium sont des marques déposées de Intel Corporation. D’autres marques
et noms commerciaux peuvent être utilisés dans ce document pour faire référence aux entités
se réclamant de ces marques et de ces noms ou à leurs produits. Dell Computer Corporation
dénie tout intérêt propriétaire aux marques et aux noms commerciaux autres que les siens.
____________________
Irrtümer und technische Änderungen vorbehalten.
© 1998 Dell Computer Corporation. Alle Rechte vorbehalten.
Warenzeichen in diesem Text: Dell, das DELL logo und OptiPlex sind eingetragene Warenzei-
chen der Dell Computer Corporation; Microsoft, Windows und Windows NT sind eingetragene
Warenzeichen der Microsoft Corporation; 3Com und EtherDisk sind eingetragene Warenzeichen
der 3Com Corporation; Intel, LANDesk und Pentium sind eingetragene Warenzeichen der Intel
Corporation. Alle anderen in dieser Dokumentation genannten Warenzeichen und Produktbe-
zeichnungen sind Eigentum der entsprechenden Hersteller und Firmen. Die Dell Computer
Corporation verzichtet auf alle Besitzrechte an Warenzeichen und Handelsbezeichnungen, die
nicht ihr Eigentumsind.
____________________
La información en este documento podría cambiar sin previo aviso.
© 1998 Dell Computer Corporation. Quedan reservados todos los derechos.
Marcas comerciales usadas en este texto: Dell, el logotipo DELL y OptiPlex son marcas comer-
ciales registradas de Dell ComputerCorporation; Microsoft, Windows y WindowsNT son marcas
comerciales registradas de Microsoft Corporation; 3Com y EtherDisk son marcas comerciales
registradas de 3Com Corporation; Intel , LANDesk and Pentium son marcas comerciales registra-
das de Intel Corporation. Otras marcas comerciales y nombres comerciales pueden utilizarse en
este documento para referirse a las entidades que poseen las marcas y los nombres, o a sus
productos. Dell Computer Corporation renuncia a cualquier interés de propiedad en las marcas
comerciales y los nombres comerciales que no sean los suyos.
August 1998 P/N 4485C Rev. A05

Dell OptiPlex GX1 and NX1 Documentation Update 1-1
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This document updates information contained in your Dell OptiPlex GX1and NX1 sys-
tem documentation. It describes the following features:
Reinstallation of DirectX and video drivers
Proper configuration of network drivers if you have a 3Com®PCI 3C905b Ether-
net network interface controller (NIC)
Reinstallation of the Microsoft®-updated Advanced Technology Attachment
Packet Interface (ATAPI) driver for the Microsoft Windows NT®4.0 operating
system
New online documentation
New System Setup options
System board layout for new OptiPlex systems
New microprocessor option
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If you ever need to reinstall the Microsoft Windows®95 operating system, you should
also reinstall the software drivers and utilities that came with your Dell system. This
section specifically describes how to reinstall DirectX drivers and video drivers. Your
online
System User’s Guide
or
Network Administrator’s Guide
describes how to
install other types of drivers and utilities.
DirectX is a group of technologies designed to enhance application programs that are
rich in multimedia elements such as full-color graphics, video, 3D animation, and
surround sound. The presence of DirectX drivers on your system also ensures
accelerated-graphics port (AGP) support.
To reinstall DirectX drivers and any other drivers and utilities that came with your sys-
tem, you need a set of diskettes that contain the software. If your computer is
not
part of a centrally managed network, such as a network that connects computer
workstations in an office environment, you should create a set of program diskettes
using the Dell Program Diskette Maker. The program diskettes contain installation
programs for the drivers and utilities needed by your system. To access the Program

1-2 DellOptiPlex GX1 and NX1 Documentation Update
Diskette Maker, click the Start button and point to Programs. Then point to Dell
Accessories and click Program Diskette Maker. If your computer is part of a centrally
managed network, check with your network administrator for information on
reinstalling drivers and utilities.
If you are a network administrator and you received the Network Administrator’s Kit,
Dell provides drivers and utilities for Windows 95 on diskettes. Normally, you should
install the drivers on the managing server and then use Intel®LANDesk®Configura-
tion Manager to download and install the drivers on an OptiPlex GX1 Managed PC
system or an OptiPlex NX1 Net PC system. See your online
Network Administrator’s
Guide
for information on downloading and installing drivers over the network.
To reinstall DirectX drivers locally on a system with a diskette drive, follow these
steps:
1. If you have not done so already, create a program diskette set of drivers as
described previously. Or, if you received the Network Administrator’s Kit, locate
the diskettes containing drivers and utilities.
2. If you reinstalled Windows 95, make sure Universal Serial Bus (USB) support was
reinstalled along with the operating system.
USB support is enabled when Windows 95 is installed by Dell. However, if you
need to reinstall the operating system, USB support should also be reinstalled.
See your system’s
Reference and Installation Guide
or your online
Network
Administrator’s Guide
for more information.
3. Save any work and close all application programs, because you will need to
restart the computer at the end of this procedure to complete the installation.
4. Insert the
DX5 Drivers Diskette 1
into the diskette drive.
5. Click the Start button and then click Run.
6. Type a:\setup.exe and click OK.
7. Follow the instructions on your screen, and insert the
DX5 Drivers Diskette 2
when prompted.
When the setup.exe program is complete, a message appears prompting you to
run another program.
8. Click the Start button and then click Run. Type c:\windows\ dx5core.exe
and click OK.
9. Follow the instructions on your screen to complete the DirectX drivers installation
and restart the system when prompted.
10. After the system restarts, insert the video drivers diskette into the diskette drive.
11. Click the Start button and then click Run.
12. Type a:\setup.exe and click OK.

Dell OptiPlex GX1 and NX1 Documentation Update 1-3
13. Follow the instructions on your screen to reinstall the primary video drivers.
When Windows 95 restarts, you can change the display resolution and color
depth. See the operating system documentation for more information.
NOTE: If you change the display resolution, you may need to adjust the refresh
rate for optimum viewing.
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The following subsections describe how to manually set the network frame type for
an Internetwork Packet Exchange/Sequenced Packet Exchange (IPX/SPX)-compatible
network protocol and which version of 3Com EtherDisk®XL drivers and utilities you
should use.
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If your system is connected to a network, verify the following network protocol
settings:
1. Right-click the Network Neighborhood icon on the Windows desktop, and then
select Properties from the pop-up menu.
2. Under the Configuration tab in the Network window, click IPX/SPX-
Compatible Protocol if it is not already highlighted.
3. Click the Properties button to open the IPX/SPX-Compatible Protocol Proper-
ties window.
4. Click the Advanced tab, and then select Frame Type from the Property list.
5. Select the appropriate frame type from the Value menu, according to your net-
work requirements.
6. Follow the instructions on your screen to complete the configuration.
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The 3Com EtherDisk XL version 3.01 diskettes provided by Dell are compatible with
the 3C905 family of NICs. If you purchased a 3Com 3C905-based NIC separately, do
not attempt to use the 3Com EtherDisk XL diskettes that came with the NIC. Use
only the 3Com EtherDisk XL version 3.01 diskettes that were provided by Dell.
For more information on NIC drivers and utilities, see your system’s
Reference and
Installation Guide
or your online
Network Administrator’s Guide
.
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If you purchased Microsoft Windows NT 4.0 with your computer, your system is
equipped with the Microsoft-updated ATAPI driver.

1-4 DellOptiPlex GX1 and NX1 Documentation Update
Dell has installed the Microsoft-updated ATAPI driver for your operating system, and it
is operative when you receive your computer. No further installation or configuration
is needed.
NOTE: If Windows NT 4.0 is reinstalled, the Microsoft-updated ATAPI driver must also
be reinstalled.
The driver for Windows NT 4.0 has also been copied to your hard-disk drive in
diskette-image form. If you need to reinstall or remove this driver, you can do so as
described in the following subsections.
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NOTE: To install the Microsoft-updated ATAPI driver for Windows NT 4.0, you must
have a mouse connected to the system and Windows NT 4.0 must already be
installed on the hard-disk drive connected to the primary enhanced integrated drive
electronics (EIDE) channel.
To reinstall the Microsoft-updated ATAPI driver for Windows NT 4.0, follow these
steps:
1. If you have not already done so, use the Program Diskette Maker to make a dis-
kette copy of the Dell Microsoft-updated ATAPI driver diskette image on your
hard-disk drive.
The Program Diskette Maker is available through the Dell Accessories program
folder. For more information, refer to the online help provided in the Program
Diskette Maker.
2. Start Windows NT. If you are already running Windows NT, close any open docu-
ments or application programs.
3. Insert the Microsoft-updated ATAPI driver diskette into drive A.
4. Click the Start button and click Run. Type a:\setup.bat in the Run window,
and then click OK.
A black screen quickly appears and disappears, indicating that the driver file has
been loaded. Setup automatically saves the existingatapi.sys driver as atapi.000
and loads the new driver into the system32\drivers subdirectory in the
Windows NT directory.
5. Remove the diskette from drive A. Then restart the system.
NOTE: To enable or disable direct memory access (DMA) while using the Microsoft-
updated ATAPI driver, run dmacheck.exe from \support\utils\i386 on the
Microsoft
Windows NT Service Pack 3
CD-ROM.

Dell OptiPlex GX1 and NX1 Documentation Update 1-5
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To remove the Microsoft-updated ATAPI driver, follow these steps:
1. Start Windows NT. If you are already running Windows NT, close any open docu-
ments or application programs.
2. Use Windows NT Explorer to open the system32\drivers subdirectory in the
Windows NT directory.
3. Rename the existing atapi.sys file to atapi.bak.
4. Rename the atapi.000 file to atapi.sys.
5. Restart the computer.
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In addition to the online
System User's Guide
, your system also includes online
versions of the
Reference and Installation Guide
and the
Diagnostics and Trouble-
shooting Guide
in portable document format (PDF) files on the hard-disk drive. These
documents are located in the Dell Accessories folder.
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The following subsections provide updated infromation about some of the options on
the System Setup screen. Page 1 of the System Setup screen includes new fields for
DAC Snoop and ACPI and reports primary drives and chassis intrusion differently than
before (see Figure 1-1). Use of the Setup Password (reported on page 2 of the Sys-
tem Setup screen) has also changed.
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Drives:
Primary Type Cyls Hds Pre LZ Sec Size
Drive 0:Auto EIDE Drive 9216
Drive 1:None
To change the value in a field,
enter a number or use the left- or
right-arrow key.
Changes take effect immediately.
change values Esc exit
Level 2 Cache:
System Memory:
Video Memory:
Service Tag:
Asset Tag:
Diskette Drive B:
Dell Computer Corporation (www.dell.com)
Page 1 of 2
Date: Mon April 1, 1998
System OptiPlex GX1 400MTbr Setup
Diskette Drive A:
Tab,Shift-Tab change fields
Secondary
Drive 0:Auto CD-ROM Device
Drive 1:None
Not Installed
3.5 inch, 1.44 MB
This category sets the time in
24-hour format (hours:minutes:
seconds) for the internal clock/
calendar.
Time: 13:17:02
Alt-P next
Reserved Memory:
CPU Speed:
Num Lock:
Chassis Intrusion:
DAC Snoop:
ACPI:
None
400 MHz
On
Enabled
On
On
512 KB Integrated
32 MB SDRAM
4 MB SGRAM
Pentium®II Processor 400 MHz
,
BIOS Version:
XXX
Alt-B reboot
XXXXX
XXXXX

1-6 DellOptiPlex GX1 and NX1 Documentation Update
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System Setup reports hard-disk drives in one of two ways:
Newer hard-disk drives and all hard-disk drives over 8 gigabytes (GB) are reported
as an EIDE Drive, without details on type, cylinders, heads, cylinder numbers,
and sectors. See Figure 1-1 for an example.
Older hard-disk drives are reported with full details about type, cylinders, heads,
cylinder numbers, sectors, and size.
NOTE: For all Dell-installed hard-disk drives, set the appropriate
Drive option to Auto.
Use one of the following options if you have an older EIDE hard-disk drive not shipped
with the system from Dell and with less than 528 megabytes (MB) in capacity:
A specific drive-type number
Usr1 or Usr2
For each drive,you can choose the seven parameters as a group by drive-type number
or you can enter the parameters individually from the keyboard. A
drive-type number
specifies the parameters of a hard-disk drive, based on a table recorded in the sys-
tem’s basic input/output system (BIOS).
NOTE: Operating systems that bypass the system BIOS may not obtain optimum
hard-disk drive performance.
If you choose the Usr1 or Usr2 option, you must supply the following parameters for
the drive:
Typeis the drive-type number for the selected hard-disk drive (in this case, Usr1
or Usr2).
Cyls is the number of logical cylinders.
Hds indicates the number of logical heads in the drive.
Pre(
precompensation cylinder
) is the cylinder number at which the electrical cur-
rent for the drive head changes to compensate for differences in data density
across the disk surface (this parameter has no effect for EIDE drives).
Lz is the cylinder number that is used as the drive’s landing zone for the
heads when the drive is not in use.
Sec is the number of logical sectors per track.
Size (automatically calculated by the system) indicates the number of millions of
bytes of storage provided by the drive.
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Chassis Intrusiondisplays the status of the system chassis intrusion monitor and can
be set to Enabled, Enabled-Silent, or Disabled. The default is Enabled.

Dell OptiPlex GX1 and NX1 Documentation Update 1-7
If the computer cover is removed while the intrusion monitor is set to Enabled, the
setting changes to Detected, and the following message appears during the boot
sequence at the next system start-up:
Alert! Cover was previously removed.
If the computer cover is removed while the intrusion monitor is set to Enabled-
Silent, the setting changes to Detected, but the alert message is not displayed during
the boot sequence at the next system start-up.
If the intrusion monitor is set to Disabled, no intrusion monitoring occurs and no mes-
sages are displayed.
To reset the Detected setting, enter the System Setup program during the system’s
power-on self-test (POST). At the Chassis Intrusion option, press any edit key to
reset the setting, and then choose Enabled, Enabled-Silent, or Disabled.
NOTE: When the setup password is enabled, the setup password is required to reset
the Chassis Intrusion option.
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DAC Snoop lets you correct video problems that may occur when certain video
expansion cards are used. The default is Off. If you are using a video expansion card
and problems such as incorrect colors or blank windows occur, set DAC Snoop to
On.
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This option controls the operation of the system’s Advanced Configuration and Power
Interface (ACPI) feature. The default is On.
When ACPI is set to On, momentarily pressing the power button places the system in
a power-saving mode. To turn the system off completely, press the power button for
more than four seconds. When ACPI is set to On, interrupt request (IRQ) line 9 is not
available for use by an expansion card.
When ACPI is set toOff, momentarily pressing the power button turns off the system
completely. With this setting, IRQ9 is available for use by an expansion card.
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If Setup Password is set to Enabled, you must enter the correct setup password
before you can modify the majority of the System Setup options. If you do not enter
the correct password in three tries, the system lets you view, but not modify, the Sys-
tem Setup screen, with one exception: if Password Status is Unlocked, you may
modify the system password.

1-8 DellOptiPlex GX1 and NX1 Documentation Update
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New OptiPlex GX1 and NX1 systems contain the system board shown in Figure 1-2.
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The OptiPlex GX1 and NX1 systems now offer the Intel®Pentium®II microprocessor
with an internal speed of 450 megahertz (MHz), an external speed of 100 MHz, and a
512-kilobyte (KB) level 2 (L2) cache.
SEC cartridge connector
(SLOT1)
microprocessor
fan connector (FAN)
microphone jack (MIC)
video
connector (MONITOR)
serial port 2
connector
(SERIAL2)
USB connectors
(USB) (2)
parallel/serial port 1
connectors (stacked)
(PARALLEL/SERIAL1)
mouse/keyboard
connectors(stacked)
(MOUSE/KYBD)
audio line-in
jack (LINE-IN)
audio line-out
jack (LINE-OUT)
video-memory
upgrade socket
(VIDEO_UPGRADE)
control panel
connector (PANEL)
battery socket
(BATTERY)
optional
integrated NIC
connector (ENET)
riser board connector
(RISER) system board jumpers
primary EIDE
interface connector
(IDE1) (pin-1 corner)
secondary EIDE
interface connector
(IDE2) (pin-1 corner)
front of computer
diskette/tape drive
interface connector
(DSKT) (pin-1 corner)
DIMM sockets (3)
(DIMM_A–DIMM_C)
main power input
connector (POWER_1)
3.3-V power input
connector (POWER_2)
ATI multimedia
connector (AMC)
CD-in
connector (CD-IN)
telephony
connector
(TAPI)
chassis intrusion
switch connector