Demystifying the "Intel 21 B6 E1 E2": A Guide to Identification and Specs
If you’ve peeked inside an older PC and spotted the marking 21 B6 E1 E2
etched onto the motherboard, you might be scratching your head trying to find a manual or driver for that specific model. The reality is that "21 B6 E1 E2" is not actually a model number.
It is a regulatory and industry specification marking used by Intel across many different desktop boards. Because of this, searching for it directly can be confusing, but don't worry—here is how to identify what you actually have and what the common specs look like. Why "21 B6 E1 E2" Isn't Your Model Number
Intel motherboards often feature various regulatory codes like 21-b6-e1-e2
. These numbers indicate compliance with safety or industry standards rather than the specific board identity. To find your true model number (like ), you should look for a small white barcode label with an (Altered Assembly). Common Variations Found in the Wild
Despite being a generic marking, this code frequently appears on boards from the
eras (roughly 2nd to 4th Gen Intel Core processors). Here are common configurations often sold under this label on sites like Socket LGA 1155 Version : Often paired with 2nd or 3rd Gen CPUs like the Intel i5-2300 : Typically supports memory with 2 to 4 slots. Form Factor Socket LGA 1150 Version : Such as the Intel DB85FL : Intel B85. : Supports Key Specifications Table (Typical for these Boards) Specification CPU Socket LGA 1155 (2nd/3rd Gen) or LGA 1150 (4th Gen) Memory Type DDR3 SDRAM Often 8GB to 32GB (depends on specific model) Integrated Intel HD Graphics (via CPU) 1x PCIe x16, multiple PCI/PCIe x1 slots Helpful Resources and Links
If you need specific technical documentation, you’ll need to use your
on official support pages. However, here are general starting points: Official Intel Support Intel Support Tool to auto-detect your hardware. Manuals & Guides
: General integration guides for these vintage boards can be found on Intel's Integration Hub : Once you identify the model, you can search the Intel Download Center Troubleshooting Tip: "Platform Not Supported" Vintage Intel desktop board BIOS update files needed
Specification Link
You can find the detailed specification of the Intel Desktop Board DZ77SL-50KZ on the Intel website: https://www.intel.com/content/www/us/en/support/motherboards/desktops/dz77sl-50kz.html
Conclusion
The Intel Desktop Board DZ77SL-50KZ is a powerful and feature-rich motherboard designed for 3rd generation Intel Core processors. With its support for USB 3.0, SATA 6Gb/s, and Intel Gigabit Ethernet, this motherboard offers excellent performance and connectivity options. Whether you're a gamer, content creator, or business user, the Intel Desktop Board DZ77SL-50KZ is an excellent choice for your next PC build.
Additional Resources
FAQs
Q: What is the maximum memory capacity of the Intel Desktop Board DZ77SL-50KZ? A: The maximum memory capacity of the Intel Desktop Board DZ77SL-50KZ is 32GB.
Q: What type of processors does the Intel Desktop Board DZ77SL-50KZ support? A: The Intel Desktop Board DZ77SL-50KZ supports 3rd generation Intel Core i7, i5, and i3 processors.
Q: What is the LAN speed of the Intel Desktop Board DZ77SL-50KZ? A: The LAN speed of the Intel Desktop Board DZ77SL-50KZ is up to 1000Mbps.
Q: What type of audio does the Intel Desktop Board DZ77SL-50KZ support? A: The Intel Desktop Board DZ77SL-50KZ supports 7.1-channel audio, with Dolby TrueHD.
The alphanumeric sequence "21 B6 E1 E2" (often preceded by "/21") is not a specific Intel motherboard model number, but rather a regulatory or industry specification marking found on several older Intel boards. Because this code is used across different products, "specifications" can vary depending on which actual board you have.
However, boards featuring this specific marking typically align with the following general specifications: Common Core Specifications
Based on listings for boards with this marking, they usually support 2nd and 3rd Generation Intel Core processors: Socket Type: LGA 1155 (Socket H2). Memory Type: DDR3 SDRAM, typically with 2 memory slots. I/O Ports: Ethernet (RJ-45). USB 2.0 and USB 3.0 ports.
Video outputs usually include VGA, DVI, or HDMI depending on the specific sub-model. Expansion: 1 x PCI Express x16 slot for dedicated graphics. How to Find Your Exact Model
Since "21 B6 E1 E2" is just a regulatory mark, you should look for the AA number (Altered Assembly) printed on a small barcode label on the board itself.
Official Search: Use the Intel Product Specifications (ARK) tool to enter the AA number or a model name like "DH61WW" or "DH61HO" often found near the CPU socket. intel desktop board 21 b6 e1 e2 specification link
Manuals: General guidance for these legacy boards can be found in the Intel Integration Guide or on sites like ManualsLib for similar regulatory-labeled boards.
Do you have the AA number or a 6-digit code from the board's barcode so I can find the exact manual for you?
intel® Desktop board DH61HO - Classic Series - Mouser Electronics
The identifier 21 B6 E1 E2 (often seen as /21-B6-E1-E2 ) is not a model number but a regulatory or specification marking found on several older Intel desktop boards, most commonly associated with the Intel Desktop Board DH61CR
or similar 2nd and 3rd Generation Intel Core (LGA 1155) motherboards.
Below is a draft post detailing the specifications and links for this hardware.
🖥️ Hardware Spotlight: Intel Desktop Board (Marking /21-B6-E1-E2) If you've spotted the marking 21-B6-E1-E2
on your blue Intel motherboard, you're likely looking at a "Classic Series" board like the Intel DH61CR
. These boards were workhorses for the Sandy Bridge and Ivy Bridge eras, designed for reliability in home and office builds. Key Technical Specifications
Based on the most common models bearing this marking, here is what you can expect: Socket & CPU Support : Features an socket. It supports 2nd and 3rd Generation Intel Core i7, i5, and i3 processors, as well as Pentium and Celeron chips. : Typically utilizes the Intel H61 Express Chipset 2 DIMM slots. Supports up to
(some documentation suggests a limit of 8 GB depending on the specific AA revision) of DDR3 1600/1333/1066 MHz non-ECC memory. Expansion & Graphics PCI Express 3.0 x16 slot for dedicated GPUs. Dual display support via integrated VGA and DVI-D ports (requires a processor with Intel HD Graphics). Connectivity 10 x USB 2.0 ports (6 rear, 4 internal headers). 4 x SATA 3.0 Gb/s ports. Gigabit Ethernet (10/100/1000 Mbps). The Retro Web Important Resources & Drivers Official Product Guide
: Detailed layout and installation instructions are available via The Retro Web's Intel DH61CR Guide Specifications Update
: For technical errata and addressable memory maps, refer to this Technical Specification Update Demystifying the "Intel 21 B6 E1 E2": A
: While official support has ended, you can often find legacy drivers and BIOS updates on community-maintained sites or by searching for the specific (found on a small white barcode label) on the Intel Support Site exact model using the AA number found on your board's barcode label? Intel® Product Specifications
Product Specifications * Processors. * Graphics. * Chipsets. * Wireless. * Ethernet Products. * Intel® FPGAs. * Server Products. * Intel® Desktop Board DH61CR Classic Series - The Retro Web
• Intel® 82H61 Platform Controller Hub (PCH) Peripheral Connectivity. • Four SATA (3.0 Gb/s) ports. • Ten Hi-Speed USB 2.0 ports ( The Retro Web Intel® Desktop Board DH61CR Product Guide - The Retro Web
The string "/21 B6 E1 E2" (often written as 21-b6-e1-e2) found on your Intel desktop board is a regulatory and industry specification marking
, not a model number. Because these markings appear on many different boards to indicate compliance with standards (such as FCC or safety regulations), they cannot be used to find a specific board's technical specifications. University of Colorado Boulder How to Identify Your Actual Board Model To find the correct specification link, you must locate the AA (Altered Assembly) number or the model name printed elsewhere on the board. Look for the AA Number
: Search for a small barcode label on the board with a number like AA XXXXXX-XXX . This is the most reliable way to identify an Intel board. Check the Model Name
: Look for a silkscreened name starting with "D" or "DH" (e.g., Use Software : If the computer is functional, use the Windows System Information tool to find the "BaseBoard Product" or manufacturer details. Likely Specifications Based on Similar Reports
While "/21 B6 E1 E2" is just a marking, users often find this code on older Intel boards featuring the following common traits: Socket Type : Frequently associated with : Often found on boards using the : Typically supports RAM, depending on the generation. Official Resource Links
Once you have the AA number or model name, use these official Intel tools to find your specific manual and specifications: Intel S975XBX2 Workstation Board
The Intel Desktop Board D21B6 (also marketed as D21E1 / D21E2 variants) is a compact, socketed motherboard series designed for small-form-factor desktop and embedded systems. It blends stable Intel chipset features with legacy I/O support, making it useful for industrial, thin-client, kiosk, and home-office builds that need long-term availability and reliable onboard interfaces.
Published by Tech Archive Solutions | Updated: May 2026
If you’ve landed here searching for the phrase "intel desktop board 21 b6 e1 e2 specification link", you are likely troubleshooting a legacy Intel motherboard, trying to identify a specific OEM board, or hunting down long-lost driver support pages. This alphanumeric sequence is unusual, as it does not directly match Intel’s standard product codes (like DQ67SW or DH61CR). Instead, based on pattern analysis, "21 B6 E1 E2" points toward a diagnostic error code sequence or a POST (Power-On Self-Test) LED readout specific to Intel Desktop Boards from the Core 2 Duo/Core i-series (LGA775/LGA1155/LGA1156) era.
This article decodes the meaning behind “21 b6 e1 e2,” provides the official specifications for the likely motherboard families, and—most importantly—delivers the working specification links for Intel’s archived product documentation. Warranty Period : 3 years