No, because they were set correct (667 Mhz DDR3-1333, 9-9-9-24). Even setting the timings manually doesn't make a difference. I also tried with DDR3-1066. With the G.Skill I tried DDD3-800 and timings of CL7,8,9,10. Makes no difference. It only gets more stable with more voltage, but I don't...