In regards to temps, each chip is different, the solder/TIM used internally has alot to do with that.
I had a 1.3125 VID that would hit 56/56/50/50 full load at 1.45v - 3.40GHz
I have a 1.21 VID that hits 65/65/62/62 full load at 1.45v - 3.60Gz, its a firecracker
Both on the same H2O setup.... Some chips just run hotter than others...
To the OP... Great job on the OC, my 1.31 wouldnt get past 3.4, went as high as 1.55v bios but couldnt even run 3dmark....