The model numbers are as follows:
both crucial sticks are the same, BLS4G3D18ADS316FE, 2x4gb
and the kingston one KHX1866C10D3, 1x8gb
I put the crucial memory sticks into slots A1, B1, and the kingston into B2. The same thing happened when I put it into A2. The interesting thing is that the ram is stable and detected normally, it just wont boot with the keyboard/mouse plugged in.