I pushed 1.6v through my 965 trying to get it to prime at 4.4 with no success
For me the trade off is a no brainer at that point. Even if I had to settle for 4.0 (which it seems every 920 can do) there's no way that 300mhz is worth $700 to me. I was willing to pony up the extra dough for some extreme clocking, but siceit seems that the 965s aren't really better chips, I'll put the money elsewhere.

TBH I just love the tri-sli on an intel chipset, CPU clocks are secondary at this point