Okay thanks BroI ran HyperX on my 2011 15" and it ran at 1600mhz with no issues.
There are two models of HyperX and only one works correctly. One model has that pc feature where it auto clocks.
The models ending in "G" work and the model ending in "GX" doesn't run at 1600mhz
This is the model I ran with no issues.