EVGA X79 SLI Motherboard LGA 2011 RAM support question

Yes.
From the manual:
Your new motherboard has four 240-pin slots for DDR3 memory. These slots
support 1GB, 2GB, 4GB and 8GB DDR3 DIMMs. There must be at least one
memory slot populated to ensure normal operation.
The Intel X79 chipset supports quad channel memory; you can choose any slots to insert the DIMMs.