0.8 to 0.8.2 was a big boost on lyra2z for the gtx1070 (2500 kh/s to 3200 kh/s)

However, 0.8 to 0.8.2 the hashrate regressed on lyra2z for the gtx1070ti (3300 kh/s to 2700 kh/s)

love the improvements.
However since 0.8.2 my 1070 greatly outperforms my 1070ti's on Lyra2z.

1070 avg hash 3954 KH/s
1070ti avg hash 3220 KH/s

any ideas how? I've got 4 different 1070ti's and none come close to my normal 1070....