In your BIOS settings, what is the max memory multiplier (SPD) that is available? I believe that the Clarkdale CPUs (your i3) are handled like the i5 750. In which case the highest memory multiplier you can pick is x10. This means that without OCing your CPU, you cannot run your RAM faster than 1333MHz anyway.
If you don't want to OC, don't worry about it. There's not much difference between 1333 and 1600 anyway. http://www.tomshardware.com/reviews/core-i7-870-1156,2482.html