| Field | Value | Meaning | |-------|-------|---------| | PFA | 01 | Primary fab – Penang | | YW | 21 | Week 21 | | Board trace | B6 | PCB revision B6 | | Config | E1 | Embedded controller version E1 | | Security | E2 | TPM firmware E2 | | BIOS lock | ER | Extended recovery mode enabled |
Here are some technical details of the Intel Desktop Board DZ77SL-01, 21 B6 E1 E2 ER:
(Altered Assembly) to find the correct drivers and BIOS updates from Intel. Intel Desktop Board 21 B6 E1 E2 Driver intel desktop board 01 21 b6 e1 e2 er
To identify what your motherboard is trying to communicate, you must break down the string components step-by-step:
Remove everything except:
To understand what "21 B6 E1 E2" means, it's important to know how Intel motherboards are identified. While the model number is printed on the board itself, the string you see on screen during startup is the .
If you have this motherboard in your possession and are struggling to find the exact retail model name (e.g., to update the BIOS or find compatible RAM speeds), avoid relying on the "21 B6 E1 E2" barcode sticker. Instead, use these methods: | Field | Value | Meaning | |-------|-------|---------|
— it is almost certainly a stuck or erroneous readout from a malfunctioning board, typically requiring BIOS recovery or hardware replacement.
These boards typically utilize the LGA 1155 socket (Socket H2), which supports 2nd Gen (Sandy Bridge) and sometimes 3rd Gen (Ivy Bridge) Intel processors. If you have this motherboard in your possession