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.

Dell Optiplex 990 System BIOS

AUTO INSTALLED This file was automatically installed as part of a recent update. If you are experiencing any issues, you can manually download and reinstall.
This package provides the Dell System BIOS Update and is supported on Dell Optiplex 990 for Windows and DOS Operating Systems.
Recommended

Find the best download for your system

Please enter your product details to view the latest driver information for your system

Search support

Enter your Dell Service Tag or model

Want to look up your product? Enter a product identifier. Show me how

This driver is not compatible

This driver is not applicable for the selected product. Choose another product to re-enter your product details for this driver or visit the Product Support page to view all drivers for a different product.

Find more updates. Use SupportAssist to find all the latest driver updates for your device.

Fixes & Enhancements

Fixes - Not applicable Enhancements - Enhanced Chassis Intrusion - Enhanced Multi-Display for a special graphics card
Read More

Version

A03, A03

Release date

11 May 2011

Download Type

System BIOS

Category

BIOS

Importance

Recommended
Dell Technologies recommends applying this update during your next scheduled update cycle. The update contains changes to maintain overall system health. It ensures that the system software remains current and compatible with other system modules (firmware, BIOS, drivers, and software) and may include other new features.
Available formats

File Format: CPG BIOS Executable for Windows/DOS
File Name: O990-A03.exe
File Size: 5.41 MB
This is a large file. Depending on your connection speed, it may take some time to download.
Format Description:
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.
To ensure the integrity of your download, please verify the checksum value.
MD5:
a0b69c3cd8cab9f80af23e1eac54f8e1
SHA1:
Not available
SHA-256:
Not available

By downloading, you accept the terms of the Dell Software License Agreement.

Additional details

Show All | Hide All
BIOS Update Executable for Windows/DOS Download 1. Click Download File, to download the file. 2. When the File Download window appears, click Save to save the file to your hard drive. Run the BIOS update utility from Windows environment 1. Browse to the location where you downloaded the file and double-click the new file. 2. Windows System will auto restart and update BIOS while system startup screen. 3. After BIOS update finished, system will auto reboot to take effect. Run the BIOS update utility from DOS environment (Non-Windows users) 1. Copy the downloaded file to a bootable DOS USB key. 2. Power on the system, then Press F12 key and Select "USB Storage Device" and Boot to DOS prompt. 3. Run the file by typing copied file name where the executable is located. 4. DOS System will auto restart and update BIOS while system startup screen. 5. After BIOS update finished, system will auto reboot to take effect. -------------------------------------------------------------------------------- Note 1: You will need to provide a bootable DOS USB key. This executable file does not create the DOS system files. Note 2: Please make sure you suspend BitLocker encryption before updating BIOS on a BitLocker enabled system. If you don't enable BitLocker on your system you can ignore it.

Need help with BIOS issues?

Find a solution in Dell's BIOS troubleshooting and usage guide.

Drivers help and tutorials