Nice writing 3oh6
Amazing kit you got there, truly rocks

So, you can confirm/conclude that Cold (cascade in your case) helps IMC handle higher memory clocks ?
My 920 D0 tops out at ~4300 uncore speed, using watercooling (which kind of limits Dram speed), to get 4400Mhz working, I need to jack up the Dram voltage quite high, it started to react at about 1.80v but it wasn't enough, I gave up at that point
I use Kingston T1 (also Elpidia Hyper chips, probably not the best binned chips), but I believe it can do 2200Mhz CAS8