Intel Motherboards : Asrock X99E-ITX/ac 64GB Ram

Discovered an instability problem with my GTX 970 Mini, so I RMA'd it and bought a Zotac GTX 1070 Mini. 

Surprisingly, I do not get the idea that there is any CPU bottleneck whatsoever. When I run benchmarks, my CPU usage remains low while my GPU usage goes sky high. If anything, it seems like my GPU is the bottleneck - even with a massive overclock. So, unless I'm missing something, all those people telling you that a low GHZ cpu will cause a bottleneck seems unjustified. Unless I'm missing something... 

UPDATE 2: 

Asrock has apparently updated their specs page again, this time showing 128GB Ram compatibility: 

http://www.asrock.com/mb/Intel/X99E-ITXac/?cat=Specifications

"- Max. capacity of system memory: 64GB (with Core??i7 CPU) or 128GB (With Xeon^® CPU)*"