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.

Dell Precision 5540 System BIOS

Restart required
This package contains the Dell system BIOS update. 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.

Fixes & Enhancements

- Enhances the performance of the system.


Version 1.2.3, 1.2.3



Release date

31 Jul 2019

Last Updated

31 Jul 2019


Available formats

File Format: Windows/DOS
File Name: Precision_5540_1.2.3.exe
Download Type: HTTP
File Size: 13.6 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.

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

1.5.0 14 Jan 2020
1.4.0 04 Dec 2019
1.3.3 16 Oct 2019
1.1.1 01 Jul 2019
1.0.0 20 Jun 2019
Precision 5540 System 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.

Drivers help and tutorials