Well, my D0 920 very close to the batch that you have(mine is 45B027) can do 4GHZ uncore with memory @ 2K 7-8-7-20 HyperPi 32Mx8 stable,on the classified on air.The kit that I used was the CL8 2k doms. They do 2K 7-8-7-20 1.69 vDimm and VTT was not that high(+175).I don't think it counts though as I did it with just two sticks in dual channel mode as one of the sticks died.I really don't know what is up with so many Elipda Hyper sticks dying.I personally had 1 stick die in both my Kingston Hypers and my doms. It's probably due to the 50nm fabrication process being not mature enough.

Needless to say great review, I mean great "OC report" Jody.