core voltage is totally separate to uncore and dram :P, and yes its very important you keep within 0.5v
Okay, thanks for your help. It seems so obvious just looking at the terms now. I'm not really sure why I freaked out when I saw 1.020 Core voltage. I think I'm gonna go ahead and push my DRAM to 1.66 with Uncore of 1.25 to see if I can get these OCZ platinums at the spec'd timings of 7-7-7-24.
depending on temps personally id rather put the 920 under a good phase unit and bump it upto 4.5-5ghz , im not really a mem person i never see the benefits :P
also reread the core i7 stickie for more info and help on the subject