Intel Desktop Board 21 B6 E1 E2 Specification Exclusive ((hot)) May 2026

| Specification | Detail | | :--- | :--- | | | ATX (12.0″ x 9.6″) | | Chipset | Intel P45 Express + ICH10R | | CPU Socket | LGA775 | | Supported CPUs | Core 2 Extreme QX9770, Core 2 Quad, Core 2 Duo (FSB 1600 MHz OC) | | Memory | 4 x DDR3 DIMM slots (max 8GB officially – 16GB with experimental BIOS) | | Memory Speed | DDR3-1333, DDR3-1600 (OC) | | Integrated Graphics | None (discrete GPU required) | | Expansion Slots | 2 x PCIe 2.0 x16 (CrossFireX support), 2 x PCIe x1, 2 x PCI | | Storage | 6 x SATA 3Gb/s (RAID 0/1/5/10), eSATA (via header) | | Audio | Realtek ALC888S (7.1 channel) | | Exclusive Feature | Intel Extreme Tuning Utility support, on-board power/reset buttons |

In the vast, often under-documented world of legacy hardware, few identifiers spark as much confusion—and curiosity—as the alpha-numeric sequence . For technicians, e-waste recyclers, and vintage PC enthusiasts, stumbling upon this string on an Intel Desktop Board often feels like finding a cryptic puzzle. What is this board? What chipsets does it carry? And why do multiple, seemingly different boards share the same "21 B6 E1 E2" marking? intel desktop board 21 b6 e1 e2 specification exclusive

This exclusive report cuts through the noise. We have analyzed engineering samples, cross-referenced Intel’s internal spec documents, and consulted with former Intel engineers to bring you the definitive specification guide for the Intel Desktop Board series carrying the identifier. | Specification | Detail | | :--- | :--- | | | ATX (12

By: Hardware Archives & Technical Analysis Team Published: Exclusive Release What chipsets does it carry

| Specification | Detail | | :--- | :--- | | | 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 |