Because this is an OEM board, the manufacturer sticker might say "ACER" or "eMachines" rather than a consumer brand like ASUS or Gigabyte. Do not confuse this with the "H81M" series from MSI or ASRock; those are different boards.
| If your PC is... | Search for... | |----------------|----------------| | Lenovo ThinkCentre M73/M83/M93p | “Lenovo ThinkCentre M73 Hardware Maintenance Manual” (HMM) | | Acer Veriton X2630G / S4610G | “Acer Veriton S4610G Service Guide” | | Unknown brand | Look for a on the board: MIH81R Rev: 1.0 – then search with MIH81R pinout or MIH81R front panel header | mih81r motherboard manual