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: 5820T_2.5.0.exe
File size: 17.88 MB
To ensure the integrity of your download, please verify the checksum value.
MD5: 323b58247d3f5acf0a74faae22c1a08f
SHA1: 821322e343255ec4448675795c20a20b2d375aaf
SHA-256: 95b89850873e3714cf269c36e368618e123cc4258756ef2662d4ad5e8c716bf0
Fixes & Enhancements
- Fixed the issue where the system initiates three beep code and the LED indicator on the power button does not turn off. This issue occurs when you press the power button after installing both ECC and Non-ECC Memory.
Important Information
- Once the BIOS is upgraded, you cannot downgrade the BIOS EXE/Recovery (RCV) to versions from 2.0.0 to version 1.10.5 due to restrictions. BIOS downgrades are restricted when there are security updates and important fixes with earlier versions that impact the functionality of the system.
- If the BIOS update gets stuck at 0%, Dell Technologies recommends that 2k, 4k, or higher resolution display not be used for BIOS updates. It is applicable if your BIOS version is between 2.0.1 and 2.3.0. If you are using 2k, 4k, or higher resolution display, ensure that you lower the resolution to 720p or 1080p.
- BIOS updates take no more than 5 minutes to be installed on your system. You can install the updates in the background while using the system
Supported Operating Systems
Installation instructions
Updating the BIOS from Windows
Note 1: Before updating the BIOS, ensure that you suspend BitLocker encryption on a BitLocker-enabled system. If BitLocker is not enabled on your system, you can ignore this step. For information about how to disable BitLocker, see How to Enable or Disable BitLocker with TPM in Windows at support.dell.com.
Note 2: Do not turn off power or interrupt the BIOS update process during the update.
Note 3: Your system requires a restart after installing the BIOS. The restart can be deferred but must be completed to ensure that the update is installed.
Download and Installation
1. Click Download File.
2. Click Save to save the file to your hard drive.
3. Browse to the location where you downloaded the file.
4. Double-click the new file.
The system restarts automatically and updates the BIOS at the system startup screen. After the BIOS update is complete, system restarts again.
Updating the BIOS from BIOS Boot Menu (independent of operating system)
Note 1: Before updating the BIOS, ensure that you suspend BitLocker encryption on a BitLocker-enabled system. If BitLocker is not enabled on your system, you can ignore this step. For information about how to disable BitLocker, see How to Enable or Disable BitLocker with TPM in Windows at support.dell.com.
Note 2: Do not turn off the power or interrupt the BIOS update process during the update.
Note 3: Your system requires a restart after installing the BIOS. The restart can be deferred but must be completed to ensure that the update is installed.
Installation
1. Copy the downloaded file to a USB drive. You do not need a bootable USB drive.
2. Insert the USB drive into any USB port.
3. Power on the system.
4. At the DELL logo screen, press F12 to access the one-time boot menu.
5. Select BIOS Flash Update in the Other Options section.
6. Click the ... button to browse the USB drive to locate the downloaded file.
7. Select the file and click OK.
8. Verify the existing system BIOS information and the BIOS update information.
9. Click Begin Flash Update.
10. Review the Warning message and click Yes to proceed with the update.
The system restarts and displays a Flash Progress bar at the Dell logo screen. The system restarts again when the Flash update is complete.
Applies to
Dell Precision 5820XLT BIOS
Dell Precision T5820 BIOS