The total length of the Entry Point Structure (typically 0x1F bytes).
How to check your BIOS version in Windows 10 and 11 - Lenovo Support
This output confirms the system uses the 2.6 standard and provides a detailed count of the data structures currently in use. You can also use sudo dmidecode -t 0 to query the specific BIOS structure type. The dmidecode tool has been used for decades to reliably extract this low-level data and is even used to verify hardware configurations on virtual machines.
This gives a in seconds — very helpful for troubleshooting or inventory.
SMBIOS acts as an informational broker between device firmware and the operating system. Instead of forcing an OS to test delicate memory addresses or poll physical registers—which can trigger system instability—the system firmware generates structured, read-only tables in memory at boot time. Core Principles of the 2.6 Specification
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Version 2.6 expanded CPU type definitions to accurately identify early Intel Core i5/i7 processors, AMD Phenom processors, and specialized embedded chips.
in PowerShell rely entirely on these SMBIOS tables to "read" the physical reality of the motherboard without having to open the computer case.
| Structure Type | Name | Change in v2.6 | Purpose | | :--- | :--- | :--- | :--- | | | Processor | Added Core Count & Characteristics bits | To support Multi-core/64-bit CPUs | | Type 38 | IPMI Device | New Structure | To support BMC/Server management | | Type 39 | Power Supply | New Structure | To inventory PSU assets | | Type 0 | BIOS Info | Updated Specs | To report BIOS release date/size accurately |
Indicates the total count of structures present in the table. Anatomy of an SMBIOS Structure
Every individual data structure follows a strict binary formatting constraint. The layout is consistently organized into two distinct sections:
If your system is running SMBIOS 2.6, it is generally compatible with almost all modern operating systems, though there are some nuances for newer hardware.