I received my IP35 Pro on Friday and got it up and running with my QX6700. The problem is DIMM slots 1 and 2 appear to be completely dead. Tried 3 differents sets of RAM and only #3 and 4 work. So it will be going back shortly.

In the mean time I played around with it and managed to get 500x7 mostly stable. It would Prime for over an hour no problem but I experienced occasional reboots and freezes. A little more tweaking might have got it stable but I'm not going to waste too much time on a broken board. I'll try again when the replacement gets here.