Thanks for your prompt reply, Thent.
I still will do not get it.
G.Skill sells the F3-12800CL10Q2-64GBZL (8Gx8) kit and states that it is qualified for the Rampage IV Extreme motherboard, but the Intel chipset X79 + Core i7-3960X combinantion can only address up to 32 GB RAM.
So, will I be able to address 64 GB or not? Or will I be throwing money in the dump and would be better off buying a faster 32 GB kit?