motherboard was a custom OEM part primarily used in Acer Aspire AX1930
The dust in the old basement workshop was thick enough to feel like velvet, but Elias didn't mind. He was looking for a ghost. In the corner sat a narrow, black chassis—an Acer Aspire AX1930
If you meant something else by "manual top" (e.g., a specific section in a manual), please provide more context, and I can narrow it down further.
The motherboard is built on the chipset and uses the LGA 1155 socket.