Intel Desktop Board 21 B6 E1 E2 Specification Link ((link)) | Pro | Tips |

You're looking for the specifications of the Intel Desktop Board D21-B6-E1-E2!

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: Look for a small barcode label on the motherboard. It will follow a format like G12345-XXX Search the AA Number : Enter this code into the Intel Product Specifications (ARK) tool intel desktop board 21 b6 e1 e2 specification link

Do you have the AA number or a 6-digit code from the board's barcode so I can find the exact manual for you?  You're looking for the specifications of the Intel