KryssNova :
Hey.
I would rather advise, to use 4 sticks of RAM, instead of 2.
Since x79 has Quad Channel Memory Architecture, and therefore you would have better RAM performance.
If you would use 4 RAM slots instead of 2.
If your going for 16GB RAM, then use four 4GB sticks.
4x8GB sticks is a better alternative, otherwise he will fill up all 8 slots, as the OP wants 2x16Gb sticks.
For the OP;
LGA 2011 boards like that one run in quad channel memory, making 4 sticks the best way to go.