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First, a crucial clarification: No Intel Desktop Board has the model number “21 B6 E1 E2.”
Instead, this string is almost certainly one of the following:
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. intel desktop board 21 b6 e1 e2 specification link
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 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 First, a crucial clarification: No Intel Desktop Board
: For technical errata and addressable memory maps, refer to this Technical Specification Update
: 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
Intel has migrated most legacy product documentation to their Intel Support Archive. The following links are verified working as of May 2026. Copy and paste them directly.
The alphanumeric code 21-B6-E1-E2 (often found near marking E210882) is a regulatory or industry specification marking rather than a specific Intel motherboard model name. However, this marking is most commonly associated with boards featuring the LGA 1155 socket and 2nd Generation Intel Chipsets (like the H61 or Q67). General Specifications
Based on retail listings for boards with this specific marking (e.g., as seen on eBay and community discussions), the specifications typically include: Socket Type: LGA 1155/Socket H2.
Compatible CPUs: Support for 2nd Generation Intel Core i3, i5 (e.g., i5-2300), and i7 processors. Memory: Typically DDR3 SDRAM with 2 DIMM slots. Expansion: Often includes 1 x PCI Express 2.0 x16 slot.
I/O Ports: Ethernet (RJ-45), USB 2.0, and sometimes USB 3.0. How to Find Your Exact Model
Since "21-B6-E1-E2" is not the model name, Intel recommends using the AA (Altered Assembly) number to find the official technical product specification. FAQs Q: What is the maximum memory capacity
Locate the AA Number: Look for a small barcode label on the board with a number like "AA XXXXXX-XXX".
Search the AA Number: Enter that number into the Intel Product Compatibility Tool or the Intel Support site to find the specific model name (e.g., DH61BE, DQ67SW).
Find Specs: Once you have the model name, you can find the "Technical Product Specification" PDF on Intel's Ark.
Can you find the AA number on the physical board so I can help you find the exact manual?
Chipset: Intel P67 Express
Socket: LGA1155
Supported CPUs: Unlocked K-series (i7-2700K, i5-2500K) – overclocking enabled
Max RAM: 32GB DDR3 1333/1600 MHz (4 DIMM slots)
Form Factor: ATX (12.0” x 9.6”)
Key Specs:
Chipset: Intel Q77 Express
Socket: LGA1155
Max RAM: 32GB DDR3 1600 MHz (4 DIMMs)
Special Features: vPro, AMT 8.0, TPM 1.2, SBA (Small Business Advantage)
Key Specs:
Intel Desktop Board D21B6 (revisions E1/E2) is a microATX desktop motherboard for Intel processors in the LGA775 family (Core 2 Duo/Quad, Pentium Dual-Core, Celeron). It targets business and entry-level desktop systems with basic I/O and integrated features.