DMIEdit 5.20 is a specific version of the Desktop Management Interface (DMI) editing utility developed by American Megatrends (AMI). It is primarily used by technicians and enthusiasts to modify BIOS/UEFI string information without needing to reflash the entire firmware. What is DMIEdit?
DMIEdit (often found as AMIDEWIN for Windows or AMIDEDOS for DOS) allows users to view and change data stored in the BIOS System Management BIOS (SMBIOS) tables. This data includes:
System Serial Numbers: Essential for matching hardware to software licenses. UUIDs: Unique identifiers for the motherboard.
Asset Tags: Used by corporations to track hardware inventory.
Manufacturer/Model Strings: Customizing the "Manufacturer" name (e.g., changing "To be filled by O.E.M." to a specific brand). The "Long Story" of Version 5.20
The interest in version 5.20 specifically often stems from the PC gaming and "spoofing" community. Here is why this particular tool is frequently discussed:
HWID Spoofing: Players who have been "Hardware ID (HWID) Banned" from multiplayer games (like Valorant, Apex Legends, or Fortnite) use DMIEdit 5.20 to change their motherboard's serial numbers and UUIDs. By altering these identifiers, they attempt to bypass bans that target their specific hardware.
Compatibility: Version 5.20 is widely circulated in "spoofing kits" because it is known for its stability on Aptio V (modern) firmware and its ability to interface with the Windows kernel via its specific driver (amifldrv64.sys).
The "Motherboard Brick" Risk: Because this tool writes directly to the BIOS flash memory, using it incorrectly—or using a version incompatible with a specific motherboard—can "brick" the board, making it unable to boot.
The Anti-Cheat War: Game developers (like Riot Games with Vanguard) have evolved to detect when DMI tables have been tampered with or when "generic" serial numbers are used, leading to a constant cat-and-mouse game between the software developers and those using DMIEdit. Legal and Safety Warning
While the tool itself is a legitimate utility created by AMI for OEMs (Original Equipment Manufacturers), it is not a consumer-facing product.
Warranty: Using DMIEdit typically voids your motherboard warranty.
Permanence: Some changes are difficult to revert if you do not back up your original strings first.
Malware: Because version 5.20 is often shared on "cheat" forums and gray-market sites, many versions of the .exe are bundled with malware or "rats" (Remote Access Trojans).
DMIEdit 5.20 (specifically AMI DMIEdit/AMIDEEFI) is a powerful DOS/EFI/Windows utility designed by AMI (American Megatrends Inc.) to view and update the System Management BIOS (SMBIOS) data within the BIOS, such as serial numbers, asset tags, and model names.
Here is a full overview post based on using DMIEdit to customize your system. Complete Guide to DMIEdit 5.20 for Insyde/AMI BIOS dmiedit 5.20
Updating the DMI (Desktop Management Interface) data is crucial for system builders, IT technicians, or anyone who has replaced a motherboard and needs to restore the original manufacturer information (serial number, UUID). What Can You Edit? System Serial Number: Updating the main unit serial. Asset Tag: Tracking company property. Board Serial Number: Identifying the specific motherboard. UUID: Unique Identifier. Prerequisites DMIEdit Utility: Usually available in Windows (
) or EFI Shell versions. Look for amidediwin64.exe or amidediefi64.exe.
Administrator Rights: Windows tools require elevated commands.
Correct BIOS: Primarily intended for AMI and some Insyde implementations. How to Use DMIEdit (Windows AMIDEWINx64)
The most common method is using the Windows-based command-line tool. 1. View Current DMI Data Run this command to see all current DMI information: amidewinx64.exe /dump Use code with caution. Copied to clipboard 2. Update Serial Number
To update the system serial number, use the /SS switch followed by the new string in quotes: amidewinx64.exe /SS "YourSerialNumber" Use code with caution. Copied to clipboard 3. Update Product Name amidewinx64.exe /SP "NewProductName" Use code with caution. Copied to clipboard 4. Update Board Serial Number amidewinx64.exe /BS "NewBoardSerial" Use code with caution. Copied to clipboard 5. Update Asset Tag amidewinx64.exe /AT "NewAssetTag" Use code with caution. Copied to clipboard How to Use DMIEdit (EFI Shell)
If Windows is not installed, you can use the EFI version, which is often more reliable. Create a bootable USB with EFI Shell. Copy amidediefi64.efi to the USB. Boot your computer into EFI Shell.
Run commands similarly, for example: amidediefi64.efi /SS "NewSerial". ⚠️ Critical Warnings
Irreversible Changes: Once a DMI field is updated, it is permanent unless flashed again.
Correct Information: Ensure you type the serial numbers exactly, as this information is used for warranty validation by manufacturers.
Safety: Do not use random DMIEdit versions; use the one specifically provided by your motherboard or laptop vendor.
Disclaimer: This post is for informational purposes for technicians. Improper use of DMIEdit can lead to corrupted BIOS data. To give you the most accurate command, could you tell me:
Are you using a specific brand of laptop or motherboard (e.g., Lenovo, Dell, AMI)?
Are you trying to update the Serial Number, Asset Tag, or UUID? DMI Edit via Windows or EFI for Insyde BIOS - XMG Downloads
DMIEDIT (also known as AMIDEDOS or AMIDEWIN) 5.x is an official American Megatrends (AMI) utility designed to modify System Management BIOS (SMBIOS) data—commonly known as DMI information—on AMI Aptio BIOS systems. It allows technicians to update system information like serial numbers, asset tags, and model names. Core Functionality DMIEdit 5
Purpose: Updates motherboard DMI fields (Manufacturer, Product Name, Serial Number, UUID).
Version: The 5.x version is specifically designed for Aptio V BIOS.
Environments: Supports Windows (AMIDEWINx64) and EFI Shell (AMIDEEFI). How to Use DMIEDIT 5.x (Windows Method)
This is the preferred method for editing DMI data from Windows 10/11.
Preparation: Download the DMI Edit utilities [such as from Schenker Technologies or NCR Voyix](1.2.2, 1.4.5) and extract the files. Access: Open the Command Prompt as Administrator.
Navigate: Go to the folder containing the executable (e.g., cd C:\AMI).
Read Data: Run amidewinx64.exe /ALL to view the current DMI information.
Edit Data: Use specific commands to update fields (see list below). Key Command-Line Arguments (AMIDEWINx64) System Serial Number: amidewinx64.exe /SS "[new_serial]" Product Name: amidewinx64.exe /SP "[new_product_name]" Manufacturer: amidewinx64.exe /SM "[new_manufacturer]" System Asset Tag: amidewinx64.exe /SA "[new_tag]"
UUID: amidewinx64.exe /SU UUID (Automatically generates a new UUID) BIOS Version: amidewinx64.exe /IV "[new_version]"
Example: To change the Product Name, type amidewinx64.exe /SP "MS-7E26" and press Enter. Important Precautions
Run as Administrator: The tool will fail if not run with elevated privileges.
Reboot: Changes may not be visible until the system is restarted.
NDA Information: Note that official AMI Aptio V DMIEDIT documentation is often under NDA (Non-Disclosure Agreement). To make sure I give you the right commands, I need to know:
What is the specific brand and model of the motherboard or laptop? (e.g., MSI, HP, Asus)
Which DMI field are you trying to edit (Serial Number, UUID, Product Name)? Are you doing this in Windows or via a bootable USB? Example workflow (practical, minimal)
How to Edit DMI information in the BIOS? - MSI Global English Forum
.eff)Used by spells and items (e.g., poison, healing, teleport).
| Field | Offset | Example |
|-------|--------|---------|
| Duration (ticks) | 0x00 (2 bytes) | 0x00 0x1E = 30 ticks |
| Magnitude | 0x02 | 0x0A = 10 damage/heal |
| Flags (persistent, etc.) | 0x04 | Bitmask |
Common effects:
0x01 = damage, 0x02 = heal, 0x03 = shield, 0x04 = poison, 0x05 = mana drain.
Version 5.20 includes more verbose error handling. Here are frequent issues and solutions:
| Error Code | Meaning | Solution |
|------------|---------|----------|
| E05 | Write protection enabled | Disable BIOS write protect jumper or UEFI lock. |
| E12 | Checksum mismatch after write | Use -r flag to force recalculating the checksum. |
| E19 | Structure not found | The type or index doesn't exist; run -s to list all types. |
| E24 | Invalid UUID format | Ensure dashes are correctly placed. |
| E33 | Insufficient buffer | The new string is longer than the original field length. Use a shorter string or use a hex editor to adjust the structure length (advanced). |
The syntax for writing in dmiedit 5.20 follows a pattern:
dmiedit 5.20 -t [type] -i [index] -f [field] "[new value]"
Example 1: Change the System Product Name (Type 1, field product-name):
dmiedit 5.20 -t 1 -i 1 -f product-name "Custom-PC-2024"
Example 2: Change the System Serial Number:
dmiedit 5.20 -t 1 -i 1 -f serial-number "ABC123XYZ789"
Example 3: Change the System UUID (typically 36-character hexadecimal):
dmiedit 5.20 -t 1 -i 1 -f uuid "12345678-1234-1234-1234-123456789abc"
Legacy or niche software (e.g., medical imaging equipment software, industrial control systems) sometimes checks the "System Product Name" to ensure it runs only on approved hardware. If you upgrade hardware but the software refuses to run, dmiedit 5.20 can “spoof” the old product name without altering physical components.
Restart your computer. After booting into Windows/Linux, open a command prompt and type:
wmic bios get serialnumber
wmic baseboard get product,manufacturer
Alternatively, run msinfo32.exe. You should see your new DMI data reflected. If the system fails to boot, use your BIOS recovery jumper or re-flash the original backup from a bootable USB tool (though DMI corruption rarely prevents boot entirely; it usually just resets to defaults).
DMI (Desktop Management Interface) is a standard framework that allows management software to track and inventory hardware components. Your computer stores this data—including the system manufacturer, product name, serial number, UUID, and BIOS version—in a physical chip on the motherboard (usually the SMBIOS area of the SPI flash ROM).
dmiedit 5.20 is a command-line utility designed to read, modify, and rewrite this DMI data directly. The "5.20" designation typically refers to a specific version build known for stability and expanded support for UEFI-based systems released between 2018 and 2021. Unlike its predecessors, dmiedit 5.20 introduced safer write-protection handling and broader chipset compatibility, making it a favorite among technicians.