Because this is an OEM part, the manual is often included in the generic user guide for the specific Acer desktop model (e.g., Aspire or Veriton series) it came in.
For detailed specifications and instructions, it's recommended to refer directly to the Acer H81H3-AM V1.0 manual provided by the manufacturer, as it contains specific information and might have updates or additional details not covered here. Acer H81h3-am V1.0 Manual