Your 1066 MHz RAM, what is it actually run at? Is your memory multiplier (SPD) at x8? This would be it's default setting, but with a 185 bclk you'd be running at 185x8 = 1480 MHz. Try lowering your memory multiplier to 6.
Also what Voltage is your RAM set to? And please provide a link to your RAM.
The following may be of interest, see the section under "The Great Heist": http://www.anandtech.com/mb/showdoc.aspx?i=3652&p=20