I'm just upgrade my RAM from 8GB 1600Mhz to 16GB G.skill F3-2133C11Q-16GAO. I can't figure out how to achieve the max speed from the new RAM. My cpu is i7 870. The most I can get to proper boot is clk set to 140MHz, 1.6V, cpu multiplier set to 24x = DRAM frequency 840MHz. I tried with higher clk (167MHz) and lower multiplier - 18X (cpu speed = 3.0 GHz) but no success. Any advise how to achieve faster RAM?