Have you tried setting the voltages to AUTO except for cpu and ram?

Another guess, try 5-5-5-15 instead of 18? 40 doesnt divide by 18 and I read somewhere on this forum that the biggest latency should be the sum of the first 3, which in your case(mine too) is 5+5+5=15, but that is only a guess as it worked stable with the previous bios.

I would try 2.2 on ram(even though it is rated 2,1) @ 15-5-5-5 rest on auto. Set all voltages to auto except for cpu and ram. Worked in my case although I had to pump the volts on ram to 2,25 for my 800 stick to work fully stable @ 950.