: The official part number for the manual is often printed on a sticker inside the computer case – look for "FRU 46R1737" or similar. That FRU number can be searched directly.
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: Unlike standard boards with a 9-pin layout, this board often features a 13-pin proprietary header . Lenovo Is6xm Rev 1.0 Motherboard Manual
If you are looking to breathe new life into a PC running this motherboard, here are the "safe zones" for upgrades: : The official part number for the manual