Intel Desktop Board 21 B6 E1 E2 Specification Jun 2026

You can often see the specific model name (e.g., DH61BE, DQ67SW) on the initial splash screen when you turn on the computer or by entering the System BIOS .

Because Intel printed these universal compliance codes alongside their distinct regulatory mark across multiple hardware iterations, boards bearing this specific string span several generations of hardware—most notably LGA 775 (Core 2 Duo/Quad) and LGA 1155 (2nd and 3rd Gen Intel Core i3/i5/i7) platforms.

| Chipset | Notable Features | | :--- | :--- | | | AGP 4x graphics slot, support for PC133 SDRAM or DDR-200/266 memory, ATA-100 IDE support. | | Intel® 865 Series | AGP 8x graphics slot, dual-channel DDR-400 memory support, Serial ATA (SATA) 1.5 Gb/s, Intel® High Definition Audio (Azalia). | | Intel® 915 Series | Transition to PCI Express (PCIe) x16 graphics, LGA775 support, DDR2 memory, Intel® Graphics Media Accelerator 900 (if integrated). | | Intel® 945 Series | Improved performance, SATA 3.0 Gb/s, support for Intel® Viiv™ technology (for media centers), DDR2-667 memory support. | | Intel® 975X | Dual PCIe x16 graphics (for Crossfire or early SLI), high-performance workstation and gaming support, enthusiast-class feature set. | | Intel® P35 / G33 / G35 | Support for 1333 MHz Front Side Bus (FSB), DDR2-800 memory, PCIe 1.1, robust I/O capabilities. |

This alphanumeric string is a displayed via two diagnostic LEDs (Green and Red) on the board itself. On legacy Intel boards, these LEDs flash in a binary sequence to indicate where the boot process is failing. intel desktop board 21 b6 e1 e2 specification

Depending on whether your board is from the older Core 2 Duo era or the newer Core i3/i5/i7 eras:

If the POST process halts with a 2-1-2 beep code or stalls at E1 or E2 on a diagnostic card, it suggests an issue with or memory detection —often pointing to a failing component that must be replaced before the system can continue booting.

To accurately determine the true specifications of your specific board, you must look past this industrial marking and locate the board's true model number or . This article clarifies what this widespread layout marking means and details the technical specifications of the most common legacy Intel motherboards that feature it. Deciphering the "21 B6 E1 E2" Markings You can often see the specific model name (e

If you own this board, be aware of these practical constraints:

The platform uses basic dual-channel architecture designed for stability over high-frequency performance. DDR3 SDRAM.

LGA 1155, supporting 2nd and 3rd Generation Intel Core i3/i5/i7 processors. Chipset Examples: Commonly associated with chipsets like the Intel Q67 Express or similar "business line" series. Typically supports RAM via dual slots. Expansion: Often includes one slot and integrated graphics support via the processor. How to Find Your Actual Model | | Intel® 865 Series | AGP 8x

: These boards natively support 2nd-Generation Intel Core processors, such as the Intel Core i5-2300 . They offer support for Core i7, i5, i3, Pentium, and Celeron models built on 32nm and 22nm processes.

To find the true commercial model name (e.g., DH67BL , DQ67SW , or DG31GL ), you must locate a small barcode sticker on the board. This sticker contains an AA number (Altered Assembly) . Searching the AA number on Intel Support is the only definitive way to pinpoint your specific board configuration. Technical Specification Profiles

An Intel desktop board with the marking does not refer to a standard retail motherboard model number. Instead, this specific alphanumeric string represents regulatory, manufacturing, or component tracking codes silkscreened directly onto the printed circuit board (PCB).

: The hardware platform was originally engineered to run Windows 7 or Windows XP Professional. Lightweight Linux distributions (like Ubuntu LTS or Mint) also run seamlessly on this architecture, offering an excellent avenue for transforming the board into a home server or network-attached storage (NAS) unit.

Remove all non-essential components (expansion cards, extra RAM, non-boot hard drives) and run with just the CPU, one stick of RAM, and the graphics. If the system posts, add components one by one to isolate the faulty part.