ASRock board required 1.85v for certain higher OCes, your ASRock board is an asrock board not a asus or gb board. SB has a safe range from intel of upto 1.9v, so just keep under that. lowering your CPu PLL wont help. My Extreme7 Gen3 required increase, and it was the oddest thing, then i get a bunch of asrock owners telling me that they had to raise it as well.
Don't leave LLC on auto, you want to set it, set it to level2 or level 3, level3 will run cooler, but level2 will require you to set a lower voltage.