Typically some things in games that you could lower to take the strain off the CPU:
Although this will vary from game to game, due to the engine used and if those are processed using GPU or CPU. Seen as i do not own Crysis 3 i would not be able to make solid sugesstions.
Good work on capturing the CPU and GPU load at the same time, MSI AB is very good for this, you can then see quite clearly if CPU bottlneck is the cause.
If you were...