Intel Desktop Board 21 B6 E1 E2 Manual «2025»
The Intel Desktop Board covered in this manual targets legacy value or business desktop systems. It supports Intel Pentium 4 / Celeron D / Core 2 Duo (depending on specific chipset: 915G/945G/946GZ/GL). The codes “21 B6 E1 E2” often appear on PCB silkscreen or BIOS labels for factory identification.
Typical features of such a board (circa 2012–2013):
| Category | Feature | |----------|---------| | CPU | LGA1155 – supports Intel 2nd & 3rd gen Core i7/i5/i3, Pentium, Celeron | | Chipset | Intel H61 Express | | Memory | 2 x DDR3 DIMM slots, up to 16 GB, DDR3 1066/1333 MHz | | Graphics | Intel HD Graphics (depends on CPU) – VGA + DVI-D (no HDMI on base models) | | Expansion | 1 x PCIe 2.0 x16, 1 x PCIe 2.0 x1, 1 x PCI | | Storage | 4 x SATA 3Gb/s (no SATA 6Gb/s) | | USB | Up to 10 USB 2.0 ports (4 rear, 6 via headers) – no USB 3.0 on H61 base | | LAN | Realtek RTL8111E Gigabit Ethernet | | Audio | Realtek ALC892 6-channel HD audio | | Rear I/O | PS/2 (mouse/keyboard), VGA, DVI-D, 4x USB 2.0, LAN, 3x audio jacks | | Form factor | microATX | | BIOS | Intel Visual BIOS (UEFI) |
⚠️ Some DH61 variants added USB 3.0 via a separate controller, but original H61 lacked native USB 3.0.
The manual will direct you to downloadcenter.intel.com, but Intel removed legacy drivers. You need third-party archives for:
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The alphanumeric code "21 B6 E1 E2" (often seen as part of a longer string like 2LI/21-b6-e1-e2 regulatory marking
found on several Intel Desktop Boards from the early 2010s, specifically those using the Intel 7 Series Chipset (LGA1155 socket)
. Because this is a generic marking for industry specifications, it cannot be used to identify a single specific motherboard model.
To find the correct manual, you must first identify your board's
(Altered Assembly), which is usually found on a small barcode label on the board. Likely Motherboard Models The Intel Desktop Board covered in this manual
Based on this marking, your board is likely one of the following models from the Intel 7 Series
family. You can find their specific Technical Product Specifications (TPS) and manuals below: Intel® Desktop Board DB75EN Manual Type Technical Product Specification (TPS)
: Supports 2nd and 3rd Gen Intel Core processors, Intel B75 Express Chipset, and dual-channel DDR3 memory. Intel® Desktop Board DH77EB Manual Type Technical Product Specification (TPS)
: MicroATX form factor, SATA 6.0 Gb/s support, and USB 3.0 headers. Intel® Desktop Board DQ77MK Manual Type Technical Product Specification (TPS)
: Executive Series board with Intel Q77 Express Chipset, supporting up to 32 GB of DDR3 memory. Standard Installation & Support For any of these boards, Intel provides a universal Integration Guide that covers basic assembly steps: Core Setup Steps Install the I/O shield into the chassis. Secure the motherboard and install the (LGA1155). Attach the fan heatsink and connect its power cable. memory modules (DIMMs) into the appropriate slots. front panel headers (Power, Reset, HDD LED). Official Support : You can search for your specific model on the Intel Download Center to get the latest BIOS and drivers. University of Colorado Boulder How to Identify Your Specific Board If you are unsure which of the above models you have: ⚠️ Some DH61 variants added USB 3
Intel® Desktop Board DH77EB Technical Product Specification
The marking "21 B6 E1 E2" refers to industry safety standards (E210882) rather than a specific Intel motherboard model, requiring identification via the "AA number" on the board to locate the correct manual. These boards generally feature LGA 1155 sockets for second-generation Intel Core processors with DDR3 support. For general assembly instructions, refer to the Intel Desktop Board Integration Guide.