You need to use offset voltage in the bios and windows power plan needs to be om balanced.its been a while since I last overclocked. When overclocking, how do you allow the volts to drop down on idle? Which setting is it? Rather than a fixed voltage.
But as you know theres reports that balanced power plan interferes with avfs logic performance, so you might see some lose in performance whem not set to high power.
Windows patch should fix this.