I5-750 w/Gigabyte P55-UD4P
Easytune 6 worked fine for my up to 3.8 GHz, alittle over aggresive on Vcore. which I backed off on. I reduced the Multiplier to 16 (x 200) for 3.2 GHz, but only need to up multiplier to 19 for 3.8. Prior to using ET6 I did set my memory to profile 1 (DDR3-1600.
My E6400 (W/Gigabyte P965-DQ6 - Didn't try, just to easy to set up in Bios for 3.2 GHz (Thanks in large part to Tom's forum).