Your ASUS H81M-E motherboard has 2 DIMM slots and does support 16 GB(8 GB X 2) of DDR3 RAM.
We don't know the description of your computer's graphics device (integrated or dedicated card), so that's going to have a bearing on how much RAM is shared with it.
The amount of shared RAM will vary, depending on how much physical RAM there is.
What you see and what you posted is normal.
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We don't know the description of your computer's graphics device (integrated or dedicated card), so that's going to have a bearing on how much RAM is shared with it.
The amount of shared RAM will vary, depending on how much physical RAM there is.
What you see and what you posted is normal.
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