Just update your Nvidia driver and it should be fine. I think you just need to adjust the GPU position and maybe your cards are too near to other cards or possible you Machine is infected but first try to install the latest driver.
Let me know what miner you are using? and what brand of 1070/1080 you have? because not all brand are the same hash rate.
Why do you think there is something wrong with the position?
I have
1x1070 zotac amp
2x 1080 strix
1x1080 fe
1x1080 gaming x
I use, nemosminer, excavator and ccminer alexis