If you bought 1600MHz RAM, it may default to 1333MHz out of the box. To fix this:
The board has two DIMM slots (Blue and Black).
The ASUS H81M-K is a micro-ATX motherboard based on the Intel H81 chipset, which supports 4th-generation Intel Core processors (Haswell). Here are some key specifications and features:
: If you are using a modern SSD and the motherboard doesn't recognize it, check if the CSM (Compatibility Support Module) is enabled in the BIOS Boot menu.