No it's not the slot......
Open Msi Afterburner and downclock just like what you see in the image below
https://i.imgur.com/Bt098qo.pngPower limit = 65%
Core Clock = -502
Memory Clock = -502
Fan speed = 57
This will drastically give you 30MH to 31MH per second on the graphic cards
You sir are my helping hand! It works like a charm !

Thank you so much....
You also know good settings for 1070 cards?
Hi-Fish