Dell OptiPlex 755 System BIOS, A04

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

Before updating, please read the installation instructions and important information noted below.

hi testing

Driver Id : XPYK6

Importance : Critical

Version : A04, A04 Latest version Recommended version Latest and Recommended version

Release Date : 06 Nov 2007

Download Type : System BIOS

Category : BIOS

Dell OptiPlex 755 System BIOS

Download Files

File Format: This 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.

File Name: O755-A04.EXE

File size: 2.02 MB

To ensure the integrity of your download, please verify the checksum value.

MD5: 64b86e1cbf38850bf82f1b6744ff90dd

Download .EXE

Fixes & Enhancements

1. Removed China (Sinosun) TPM support.
2. Resolved defect with the floppy IDE redirection feature.
3. Optimized PCI-Express training algorithm for certain multi-head video cards.
4. Added ImageServer support.
5. Added SATA legacy mode support for older operating systems.
6. Improved handling of scenario where system runs out of Option ROM space.
7. Updated TxT AC Module to 1.3.
8. Added support for systems with no TPM installed.
9. Updated ME firmware to 1125 (UUID fix for AMT provisioning).
10. Improved hard drive password support in RAID mode.
11. Added support for RAID 0.
12. Changed default power policy to support MEDIASABLE SKU.

Installation instructions

Installation Instructions for the Universal (Windows/ DOS) format

Download file to Desktop

Use one of the methods below to flash the Bios.

Run the BIOS update utility from Windows environment

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

Download file to Desktop

The file O755-A04.EXE is using the Universal (Windows/ DOS) format and is designed to be directly executed from Windows environment.

Click Download now.
The File Download window appears.

Click the Save button.
The Save As window appears.

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

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

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

Double click the Icon on your desktop labeled O755-A04.EXE.
The Dell BIOS Flash window appears

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

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

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

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

Copy the file O755-A04.EXE to a bootable floppy.

Boot from the floppy to the DOS prompt.

Run the file by typing Y:\O755-A04.EXE (where y is the drive letter where the executable is located).

Dell OptiPlex 755 System BIOS, A04

Download Files

Fixes & Enhancements

Compatible Systems

Supported Operating Systems

Installation instructions

Applies to