I have Intel motherboard Intel® Desktop Board DH61WW The specifications for this board can be found here: http://ark.intel.com/products/54876/Intel-Desktop-Board-DH61WW The website says the motherboard supports 1600 MHz Ram chips too. I have two memory slots and one has a memory chip. This is the information about my RAM chip installed got through CPU-Z: It is seen I have a DDR3 1333 MHz ram. I want to install another RAM chip in the other slot. So I want to know which type of RAM? I am opting for DDR3, but I am confused which frequency to choose-1333 or 1600 MHz? My current Ram chip:https://www.amazon.in/STARLITE-4GB-DDR3-PC1333-Desktop/dp/B01DBL0P5E The 1333 MHz is stated more costly than the 1600 MHz chip of the same company which can be found here:https://www.amazon.in/STARLITE-4GB-DDR3-PC1600-Desktop/dp/B01DBL0LU8 Can I choose any one of 1333 or 1600 MHz? And is it important that I choose 4GB and not 2GB? Thank You.