Ok, the chip with the highest batchnumber (95) does 2,5@1,65v and 2,7@1,89v air cooled (had the Delta at max speed for 2,7 though) in nornal room temperature.

Now I'm testing #2 with batchnumber 81, the first failed Prime@2540 with 1,65v, so I started this one right up there, so far so good!

I wonder how the last one with batchnumer 0011 is

Oh, this is without burn-in. I hear these mobiles tend to like that.