Dell OptiPlex SX270 - Manual (Page 32)

1. Turn on or restart your computer.
2. When <F12> = Boot Menu appears in the upper-right corner of the screen, press <F12> to access the boot menu.
If you wait too long and the Windows logo appears, continue to wait until you see the Windows desktop. Then shut down your computer through the
Start menu and try again.
The Boot Device Menu appears, listing all available boot devices. Each device has a number next to it. At the bottom of the menu, enter the number of
the device that is to be used for the current boot only.
Changing Boot Sequence for Future Boots
1. Enter system setup .
2. Use the arrow keys to highlight the Boot Sequence menu option and press <Enter> to access the pop up menu.
3. Press the up- and down-arrow keys to move through the list of devices.
4. Press the spacebar to enable or disable a device (enabled devices have a checkmark).
5. Press plus (+) or minus (–) to move a selected device up or down the list.
System Setup Options
NOTE: To ensure an orderly computer shutdown, consult the documentation that came with your operating system.
NOTE: Write down your current boot sequence in case you want to restore it.
Drive Configuration
l Diskette Drive A — The type of floppy drive installed in the module bay. The two options are 3.5 Inch, 1.44 MB (default) and Not
Installed. This field is automatically updated if a floppy drive is detected during startup and the diskette interface is set to Auto.
l Primary Drive and Secondary Drive — The settings are Auto (use this setting for all IDE devices from Dell) and Off.
Primary Drive identifies drives attached to the primary IDE interface connector (labeled "IDE1") on the system board.
Secondary Drive identifies drives installed in the module bay.
NOTE: You must have an IDE device connected to the primary IDE interface if you have an IDE device connected to the secondary IDE
interface.
l IDE Drive UDMA — The settings are UDMA On (default) or Off.
This field enables/disables DMA transfers for the internal IDE hard-disk interface (UDMA). This feature can be used to improve data
throughput when booting or resuming the operating system.
If You Have a Problem —
See " Hard drive problems ."
Tape drives are not reflected in the Drive Configuration option.
Boot Sequence — See " Boot Sequence ."
Memory Information — Indicates amount of installed memory, computer memory speed, video memory, size of the display cache, and
channel mode (dual or single).
CPU Information
l CPU Speed — The processor speed at which the computer boots.
Press the left- or right-arrow key to toggle the CPU Speed option between the resident microprocessor's rated speed (the default)
and a lower-compatibility speed. A change to this option takes effect immediately (no restart is necessary).
To toggle between the rated processor speed and the compatibility speed while the computer is running in real mode, press
<Ctrl><Alt><\>. (For keyboards that do not use American English, press <Ctrl><Alt><#>.)
l Bus Speed — The speed of the microprocessor's system bus.
l Processor ID — The manufacturer's identification code(s) for the installed microprocessor.
l Clock Speed — The core speed at which the microprocessor(s) operates.
l Cache Size — The size of the microprocessor's L2 cache.
l Hyper-Threading — Enables or disables Hyper-Threading technology for systems that support Hyper-Threading. The default setting is
Disabled.
Integrated Devices (LegacySelect Options) — Configures the following devices integrated with the system board:
l Sound — The settings are On (default) or Off.
l Network Interface Controller — The settings are On (default), Off, or On w/ PXE. See " Boot Sequence " for more information.
l Mouse Port — The settings are On (default) or Off.
l USB Emulation — The settings are On (default), Off, and No Boot.
USB emulation allows USB devices to work with operating systems that do not have direct USB support.