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. This update addresses the Intel security advisory INTEL-SA-00233. A security advisory is a statement when a product is impacted by a security vulnerability and a remedy is available.

Fixes & Enhancements

- Firmware updates to address security advisories INTEL-SA-00233(CVE-2018-12126, CVE-2018-12127, CVE-2018-12130 and CVE-2019-11091)
- Corrected the functionality of Thunderbolt devices when enabled or disabled in BIOS.
- Removed the Preboot Intel RST Manager Optimized Defaults option.
- Removed the option to enable or disable the Fingerprint Reader Device from BIOS as the feature is inapplicable for this system.

- This update integrates the BIOSConnect feature into Dell SupportAssist OS Recovery. This feature connects the system to the Dell image server to download and recover the operating system.
- Updated the Realtek USB LAN UEFI driver version from 2.013 to 2.026 to improve the stability of connection.


Version 1.3.3, 1.3.3



Release date

16 Oct 2019

Last Updated

16 Oct 2019


Available formats

File Format: Windows/DOS
File Name: Precision_5540_1.3.3.exe
Download Type: HTTP
File Size: 20.49 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.

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 it 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.

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.

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