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 Tower 3620 System 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 provides the BIOS update for Dell Precision Tower 3620 running in the following Operating Systems: Windows and DOS

Before updating BIOS to 1.2.4, must upgrade Intel Graphic driver to 10.18.15.4279, A01, or above version to avoid blurred screen after resuming system from sleep stage. If blurred happens, please force to restart the computer then upgrade Intel Graphic driver to 10.18.15.4279, A01, or above version.
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Fixes & Enhancements

1. Update ePSA
2. Improve system waking via WOL (Wake on LAN)
3. Improve M.2 NVME SSD function during restart process, with boot mode legacy
4. Change BIOS Setup Thunderbolt default value to Disable
Read More

Version

1.2.4, 1.2.4

Release date

22 Jan 2016

Download Type

System BIOS

Category

BIOS

Importance

Optional
Dell Technologies recommends reviewing this update to determine if it applies to your system. The update contains changes that impact only certain configurations or provides new features that may or may not apply to your environment.
Available formats View Important Information
File Format: CPG BIOS Executable for Windows/DOS
File Name: Precision_Tower_3620_1.2.4.exe
File Size: 8.06 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:
3bdb8e0d3cd33942525d2033e2e14cbc
SHA1:
f03763ecaa5b8cfa07110f44188d433aa77c4a6f
SHA-256:
fae64ad856830526a655070c6f24f0f0c8212fd9fac64ac76c6a4ca5a2c45bee

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

Additional details

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Before updating BIOS to 1.2.4, must upgrade Intel Graphic driver to 10.18.15.4279, A01, or above version to avoid blurred screen after resuming system from sleep stage. If blurred happens, please force to restart the computer then upgrade Intel Graphic driver to 10.18.15.4279, A01, or above version.
Precision 3620 System BIOS
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, if Legacy Boot mode (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.

Perform the BIOS update from the BIOS Boot Menu, independent of operating system, if BIOS supported
1. Copy the downloaded file to a USB flash device. It does not need to be bootable.
2. Insert the USB flash device 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 on the "..." button to browse the USB flash device to locate the downloaded file.
7. Select the file and click "Ok"
8. Confirm the Existing System BIOS Information and the BIOS Update Information are as expected.
9. Click "Begin Flash Update"
10. Reviewing the Warning message and click "Yes" to proceed with the update.
11. The system should restart and show a Flash Progress bar on the Dell logo screen as the BIOS update is being performed.
12. The system will restart once again when the Flash update is complete.
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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

Reboot will be required

Need help with BIOS issues?

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

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