Key Motherboard Details: Model Series: Dell OptiPlex 3020 (MT/SFF). Chipset: Intel H81. Socket: LGA 1150. Memory: Supports DDR3 RAM. Dell Part Number: Look for the white sticker with a barcode inside the case; the number starts with letters like '0' or 'CN' followed by numbers (e.g., 0WMJ54). Fully working motherboard
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