Intel Desktop Board 21 B6 E1 E2 Manual ((exclusive))

The marking "21 B6 E1 E2" (sometimes written as /21-B6-E1-E2 ) found on an Intel Desktop Board is a regulatory marking

3. BIOS Setup Guide (Intel Visual BIOS)

The manual for this era describes the Legacy Intel BIOS (not UEFI). Key sections: Intel Desktop Board 21 B6 E1 E2 Manual

• Chipset: Possibly 845, 865, 915, 945, G31, G41.
• CPU socket: LGA775 or older PGA478.
• RAM: DDR or DDR2.
• Form factor: microATX or ATX.
• Known jumpers: CMOS reset (often labeled JCMOS1 or CLR_CMOS).

If your board fails to boot after a hardware change, look for a 3-pin jumper labeled BIOS or CLRDS. Normal Mode: Jumper covers pins 1-2. The marking "21 B6 E1 E2" (sometimes written

: LGA 1155 (supports 2nd and 3rd Generation Intel Core processors like the i5-2300). : DDR3 SDRAM (usually 2 slots). : 1x PCI Express x16 slot. Chipset : Possibly 845, 865, 915, 945, G31, G41

Because this code identifies a broad specification rather than a single board, "reviewing" it requires looking at the typical hardware found in this category:

Third-Party Tools: Use the CPU-Z Mainboard Tab to see the exact manufacturer and model.  2. General Integration Sequence