So I diced my G3258 today and had a bash at 5GHz SuperPi http://hwbot.org/submission/3127041 - however I forgot to do Wazza it would've shaved 4 seconds off.
Tried dicing my ram and managed to get it to boot 2600 7-11-7-25-1T with 4/38 IOL/RTL @2.2v, but no stability. So I reverted to my air profile as you can see.
I was using the Kingpin Dominance pot with it just sitting on top of the ram modules, but I had 2x problems:
1) The pot was only making good contact with one stick.
2) The OCZ heatsinks are plastic so didn't hold the heat at all causing them to shoot from -20C (lowest I saw) to -6C really quickly.
There are pictures on the submission showing the thermometer readings for pot, right ram module and ram pot (in that order) as well as one showing how one of the sticks has lots of frost while the other doesn't.
So time to rip those heatsinks off and put on some spare corsair dominator ones I have laying around to try again.