I have an intel DP67DE motherboard ruuning a I72600k cpu. I have 4 sticks DDR3 1866(10) 8GX16 CL 10-11-10-30 1.5 volts ADATA. I can only run two sticks for 16 gig in Dimms 2 and 4, the two furthest away from the cpu, blue and black. When I put the other two the system will not boot up. What can I do? Please help.