Nice Dave. What do you think about two of these sets in X79?
Hard to say. Because I can run 2133 MHz without any IMC voltage increases, chances seem very good at getting 64 GB working, but because of the issues cold-booting on X79 with the tighter XMP profile, I have a hard time just saying "YES!".
G.SKill did show a 64 GB kit @ 2600 on X79:
note the votlages used, and what seems to be LN2 cooling.
Which i think is this kit:
http://www.gskill.com/products.php?index=460
I think that for 64 GB, those are the modules to run, but note that they are only certified for a specific ASUS motherboard, and there is no 64 GB 2133 MHz kit yet.
I guess I ask for that(64 GB) next.
This kit might be more affordable:
http://www.gskill.com/products.php?index=432
There are also similar 2133 MHz 32 GB 9-11-11-31 kits in RipjawsZ and Ares product lines.