Corsair 4GB DDR3 1600MHz C9 Titanium is It Compatible with Gigabyte Ga P55M UD2 motherboard, I downloaded the brochure from its web and the name of the corsair ram is not mentioned in its list,please reply .
You also should be looking for RAM that runs at 1.65V or LESS.
Since that RAM is tested at 1600MHz at 1.7V - 1.9V it is not recommended for your board. Unless you plan on running it at 1333 MHz. Note - with an i5 or an i3 CPU you cannot run faster than 1333 MHz without OCing you CPU or making other trade offs.