Driver Details

Dell OptiPlex System BIOS, A06

Optiplex SX270 A06 System BIOS.

Fixes & Enhancements

The following changes have been made to the A04 BIOS to create the A06:

1. Fixed Quick Boot menu when no bootable drives are selected in SETUP.
2. Updated microcode for newer CPUs.
3. Eliminated possible hang on next boot when AC power is removed.
4. Fixed intermittent hang in resuming from Standby.
5. Improved keyboard test when booting from Hibernate.
6. Fixed possible hang after unplugging and re-plugging USB hubs.
7. Increased USB keyboard wait time to allow all USB devices being enumerated.
8. Added to support in PXE boot environments with Spanning Tree enabled.
9. Prevent false MCE errors from causing "bad CPU" error in POST.
10. Fixed memory size errors when changing the AGP aperture.


Version A06, A06



Release date

27 Oct 2004

Last Updated

03 Nov 2011


Available formats

File Format:Windows/DOS
File Name:SX270A06.EXE
Download Type:HTTP
File Size: 517 KB
Format DescriptionThis file format consists of a BIOS executable file. The Universal (Windows/MS DOS) format can be used to install from any Windows or MS DOS environment.
To ensure the integrity of your download, please verify the checksum value.
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By downloading, you accept the terms of the Dell Software License Agreement.

Applies to
OptiPlex System BIOS
Installation instructions
Installation Instructions for the Universal (Windows/MS DOS) format

  1. Download file to Desktop

  2. Use one of the methods below to flash the Bios.

Download file to Desktop

The file SX270A06.EXE is using the Universal (Windows/MS DOS) format and is designed to be directly executed from Windows environment.

  1. Click Download now.
    The Export Compliance Agreement appears.

  2. Read the Export Compliance Agreement.

  3. If you agree, click to select I agree..
    The File Download window appears.

  4. Click the Save button.
    The Save As window appears.

  5. Select Desktop using the drop-down menu to the right of Save in.

  6. Click the Save button.
    A progress meter moves as the download is completed.

  7. If necessary, click X in the upper right-hand corner of the Download Progress Window to close it upon completion.

NOTE: Shut down all other applications prior to running the BIOS update utility. The update utility reboots your system in order to get the new BIOS loaded.

Run the BIOS update utility from Windows environment

  1. Double click the Icon on your desktop labeled SX270A06.EXE.
    The Dell BIOS Flash window appears

  2. Click the Continue button.
    The message Pressing OK will close all applications, shut down Windows, Flash the BIOS, then reboot. appears.

  3. Click the OK button.
    The system will restart and the BIOS Flash will be completed.

Run the BIOS update utility from MS DOS environment (Non-Windows users)

NOTE: You will need to provide a bootable DOS diskette. This executable file does not create the MS DOS system files.

  1. Copy the file SX270A06.EXE to a bootable floppy.

  2. Boot from the floppy to the MS DOS prompt.

  3. Run the file by typing Y:\SX270A06.EXE (where y is the drive letter where the executable is located).

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Drivers help and tutorials

Warning: Do not turn off your computer or disconnect from your power source while updating the BIOS or you may harm your computer. During the update, your computer will restart and you will briefly see a black screen.

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This driver has been tested by both the independent software vendor (ISV) and Dell on the operating systems, graphics cards, and application supported by your device to ensure maximum compatibility and performance. Details

Dell recommends the customer review specifics about the update to determine if it applies to your system. The update contains changes that impact only certain configurations, or provides new features that may/may not apply to your environment.