I using gigabyte H55M-USB3 motherboard and i3-530 and OCZ PS3-10666 platinum edition.
In the website it say able to run as 1333, 1.8V but now the bios screen show is 1066 and run at 1.56V.
and the timing is 7-7-7-20.
Do NOT run the ram at 1.8V, that could permanently damage your CPU. The maximum Intel recommends is 1.65V. Additionally, I doubt you will see much difference between 1333 and 1066. Try to tighten the timings a bit and leave it at the lower speed.