Look at the picture again. The power limit is not set to 50%.

I set a powerlimit in msi afterburner to around 80-90% to achieve 7.4MHASH. With a powerlimit of 80-90, the card is still only pulling 50-55% in the wall.

If I force a 50% powerlimit, the card cannot spike, and the core clock will trottle down to 1600MHASH and produce a bad result.