For an OEM board like the H81H3AM V1.0, the "manual" is less about a physical booklet and more about a technical map. The physical layout of the board—specifically the front panel header pins, fan connectors, and PCIe slot limitations—is crucial for anyone trying to transplant the board into a new case or troubleshoot a "no power" scenario.

: 2x DDR3 DIMM slots, supporting up to 16GB of DDR3 1600/1333 MHz RAM.

processors, including Core i3, i5, and i7 series (such as the i7-4790 and i5-4440). Sysnapse Malaysia Additional Technical Specifications : Intel H81 Express. : Two slots supporting up to 16GB of DDR3 1600MHz RAM. : Includes one PCI Express x16 Gen 2.0 slot for dedicated graphics cards. : Features SATA III (6Gb/s) ports for high-speed SSD or HDD connections. Connectivity : Integrated Realtek Gigabit Ethernet and 5.1-channel high-definition audio. Rear I/O Ports

Always unplug the power supply from the wall before adding or removing hardware.

unless you have a CH341A programmer to recover a brick. If the board works fine, leave it as is. Only update if you need newer CPU support (e.g., Haswell Refresh like i7-4790) and you're comfortable with DOS flashing.