Just looking on Crucial's site for RAM for a Gigabyte GA-H97-DH3 mobo (I might be using it) and the two sorts are as above.
The DDR3 is 1.5V and the DDR3L is 1.35V. On the assumption that lower voltage reduces wattage, 1.35V seems the way to go, but is there any disadvantage to it?
I won't be overclocking at all.