Intel Desktop Board 21 B6 E1 E2 Er [upd]
Elias stopped. He looked at the board. He had ignored the LAN port; who used Ethernet on a retro build anyway?
If you are troubleshooting a customer or forum post mentioning "Intel desktop board 21 B6 E1 E2 Er", you are almost certainly looking at one of the above models from the Core 2 Duo / Core 2 Quad / first-gen Core i7 era (2006–2009).
Depending on the exact fabrication revision, these boards typically feature:
Dual-channel DDR3 or DDR3L slots; supports up to 8GB or 16GB total capacity depending on exact firmware 1 x PCIe x16 slot, legacy PCI slots (model-dependent) Storage Interfaces Native SATA II (3 Gbps) and SATA III (6 Gbps) ports Operating System Support Intel Desktop Board 21 B6 E1 E2 Er
User: dark_circuit Subject: 21 B6 E1 E2 Er Message: Do not attempt to fix. The batch was recalled in specific regions. Intel shipped a batch with a corrupted ROM image for the onboard LAN controller. It conflicts with the PCI bus initialization at boot.
Use from Intel’s spec sheet. For D975XBX, that means:
On Intel motherboards, diagnostic information is often broken down into specific parts. Let's analyze each part of your code: Elias stopped
Compounding the confusion, are also standard AMI/Intel BIOS Power-On Self-Test (POST) debug codes. If a computer fails to start up and a diagnostic card or built-in display stops on these characters, it points to localized hardware dropouts: Go to product viewer dialog for this item. Intel Desktop Board 21 B6 E1 E2 ER
It included a PCIe 3.0 x16 slot for dedicated graphics.
The string (often seen as 21-B6-E1-E2-ER ) refers to a series of specific regulatory or identification markings found on a range of legacy Intel Desktop Boards , rather than a single specific model number. If you are troubleshooting a customer or forum
Motherboards bearing the 21-B6-E1-E2 layout code are highly tied to Intel's Sandy Bridge and Ivy Bridge architectures.
To a layman, it looked like a serial number. To Elias, it was a curse.
: S3 Resume or Memory Chip Fault . It often signals the system is trying to wake from sleep or has encountered a memory-read failure.