crazy clocks Nemesis! congrats so near 5ghz

I'm testing my 2nd i7 920 3836A756 here and it's noticeably different from my 1st i7 920 of same batch in various ways, i.e. handles lower cpu vtt and higher bclk, but when it comes to high mem clocks >DDR3-2000Mhz and high QPI frequencies, it seems it has a more strict relationship between cpu vtt and vcore once above 1.48v cpu vtt and likes vcore to be 0.02-0.08v close to it. My first i7 920 didn't have so a strict relationship.

So guys anyone have a i7 920 with such a similar relationship to my 2nd i7 920 ?