It is important to clarify upfront: There is no official Intel Desktop Board with the model number “21 B6 E1 E2.”
This string of characters likely refers to one of two things:
However, based on common Intel naming conventions (e.g., Intel Desktop Board D945GCCR, DG31PR, DB65AL), the closest known production board associated with cryptic codes like E21B6 is the Intel Desktop Board DQ67SW (or similar Q67 Express chipset boards), where E21B6 appears on internal PCB layers or power regulation phases. intel desktop board 21 b6 e1 e2 specification exclusive
Since no official "21 B6 E1 E2" model exists, this report provides two deliverables:
If you are repairing a board with the 21 B6 E1 E2 code and the front panel header is broken, here is the exclusive pinout (from Intel’s internal 2009 engineering PDF): It is important to clarify upfront: There is
The 21 B6 E1 E2 boards use the Intel standard 2.54mm header – not the proprietary Dell/HP standard.
| Code Fragment | Likely Meaning | Common Location on Intel Boards | | --- | --- | --- | | 21 | PCB layer or assembly plant code (e.g., Foxconn or Flextronics plant 21) | Edge of board near mounting hole | | B6 | Voltage regulator phase or power IC identifier (e.g., Intersil ISL63B6) | Near CPU VRM area | | E1 / E2 | Stepping or bridge revision (e.g., Cougar Point E1 step for Q67/B65 chipsets) | Southbridge chip surface | However, based on common Intel naming conventions (e
Exclusive Finding: The only Intel Desktop Board with a B6 power stage and E1/E2 chipset stepping is the Intel DQ67SW (Sandy Bridge generation). The “21” refers to revision 2.1 of the PCB.
This is the most common board bearing the code. It is a microATX board designed for budget business PCs and entry-level home desktops.
| Specification | Detail | | :--- | :--- | | Form Factor | microATX (9.6″ x 8.0″) | | Chipset | Intel G41 Express + ICH7 | | CPU Socket | LGA775 | | Supported CPUs | Core 2 Quad, Core 2 Duo, Pentium Dual-Core, Celeron (FSB 800/1066/1333 MHz) | | Memory | 2 x DDR3 DIMM slots (max 4GB – critical exclusive note: 8GB is not officially supported) | | Memory Speed | DDR3-800, DDR3-1066 (1333 MHz downclocked to 1066) | | Integrated Graphics | Intel GMA X4500 (DX10, no HD video decode) | | Expansion Slots | 1 x PCIe x16 (Gen 1.1), 1 x PCIe x1, 2 x PCI | | Storage | 4 x SATA 3Gb/s (no RAID), 1 x PATA (IDE) | | Audio | Realtek ALC662 (5.1 channel) | | Rear I/O (Fixed) | PS/2 Keyboard, PS/2 Mouse, VGA, 4 x USB 2.0, LAN, Line-out/Mic |
Exclusive Insight: The DG41RQ with 21 B6 E1 E2 marking has a hidden limitation: it will not boot with 2Rx8 (double rank x8) DDR3 modules beyond 2GB per stick. Use 1Rx8 or low-density 2GB sticks only.
