Microns strap 1,100 - 25.6 on best cards (+640mem), while keeping <70w per card (by undervolting, but I guess it is now equal to PL70).  Drivers: somee recent ones, i think 430something
Did not get to samsung jet as I still have lot of stability problems.

Do you think, that maybe using PL instead of UV there is better stability with straps?