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 Precision Precision 5820 Tower, Precision 5820 Tower X-Series BIOS

Restart required 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 contains the Dell System BIOS update for Dell Precision 5820 Tower and Precision 5820 Tower X-Series systems that run the Windows 10 operating system. BIOS is a firmware that is embedded on a small memory chip on the system board. It controls the keyboard, monitor, disk drives and other devices.
To view all drivers for your Precision 5820 Tower, go to Drivers and downloads.
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5820T_1.9.2.exe | 16.9 MB
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File Format: CPG BIOS Executable for Windows/DOS
File Name: 5820T_1.9.2.exe
File Size: 16.9 MB
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:
bdd9247312c6804fc9006addd5b578df
SHA1:
bc6daa2e9adef077991f290c70e58a3d58289dcf
SHA-256:
734865cc625bb5f446926bdc55299cbe4426f911a910028076b9154f654f143d

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

Fixes & Enhancements

Fixes:
- Downgraded the Intel RSTe PreOS driver version from 5.3. This package fixes the issue where the power LED indicates the error code 4-6. The 4-6 blink pattern consists of the LED flashing 4 times amber, a short pause, followed by 6 times white. The pattern then repeats. The error code 4-6 indicates a RAID volume failure.
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Version

1.9.2, 1.9.2

Release date

11 Feb 2019

Download Type

System BIOS

Category

BIOS

Importance

Critical
Dell Technologies highly recommends applying this important update as soon as possible. The update contains critical bug fixes and changes to improve functionality, reliability, and stability of your Dell system. It may also include security fixes and other feature enhancements.

Additional details

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2.36.010 May 2024
2.35.008 Apr 2024
2.34.002 Feb 2024
2.31.008 Aug 2023
2.30.021 Jun 2023
2.29.130 May 2023
2.27.011 Apr 2023
2.26.014 Mar 2023
2.25.009 Jan 2023
2.24.013 Dec 2022
2.19.123 May 2022
2.16.112 Apr 2022
2.14.012 Jan 2022
2.13.128 Dec 2021
2.12.115 Nov 2021
2.10.030 Aug 2021
2.8.001 Jul 2021
2.4.001 Jul 2021
2.5.001 Jul 2021
2.0.220 Jan 2020
1.13.021 Oct 2019
1.12.102 Oct 2019
1.11.103 Jun 2019
1.10.607 May 2019
1.10.419 Mar 2019
1.8.330 Oct 2018
1.8.205 Oct 2018
1.7.114 Aug 2018
1.6.211 Jul 2018
1.5.626 Jun 2018
1.4.020 Mar 2018
1.3.221 Feb 2018
Dell Precision 5820XLT BIOS
Dell Precision T5820 BIOS
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.
Note 2: Do not turn off the power or interrupt the BIOS update process during the update.

Download and Installation
1. Click Download File, to download the file.
2. Click Save to save the file to your hard drive
3. Browse to the location where you downloaded the file and 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.
Note 2: Do not turn off the power or interrupt the BIOS update process during the update.

1. Copy the downloaded file to a USB drive. The USB drive does not need to be bootable device.
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 progress bar at the Dell logo screen. The system restarts again when the update is complete.

Need help with BIOS issues?

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

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