With DDR3, you get the 'advertised' speed by multiplying by 2. So if you see DDR3 800mhz, that means 1600mhz. 677mhz = 1333mhz and so on. The memory speed matters a lot less with the 760k. You should be good.
It should work without a problem. If you are going to use the integrated graphics on an APU, faster memory will help with demanding (3D) application performance.
With DDR3, you get the 'advertised' speed by multiplying by 2. So if you see DDR3 800mhz, that means 1600mhz. 677mhz = 1333mhz and so on. The memory speed matters a lot less with the 760k. You should be good.
You can run the new faster memory at 1333mhz for compatibility. You may need to adjust settings manually if there is instability between existing 1333mhz memory and the new Kingston 1600mhz ram.