There is a big problem for gtx1050ti cards on x16r.
Firstly i will explain the problem.
I have many rigs and they are  just include seperately gtx1070(8x quantity)- gtx1060 6gb(6x quantity) and they don't have any problem.

But i have another rig too and it include gtx1060 6gb (4 quantity) and gtx1050ti(2quantity). Total 4+2= 6 card

Time to talk about problem..
I don't set overclock for gtx1050ti. I gave different values for every cards on this rig but it set same overclock settings for gtx1060 6gb. I m explaining again, gtx1050ti works with gtx1060 6gb overclock settings despite give different values.

Also, on the motherboard gtx1050ti plug on gpu2 and gpu4 slot. But t-rex miner shows that they are plug on gpu4 and gpu5 slot. I think that problem is connected with this reason.
I added screenshots about that.
https://i.hizliresim.com/zMWaZ7.jpg  overclock settings,
https://i.hizliresim.com/6N4rB0.jpg  it shows that my gtx1050ti plug on gpu4 and gpu5
https://i.hizliresim.com/GDqP7r.png  look at the temperatures, you can understand that gpu2 and gpu4 slot is gtx1050ti because of high temperatures. it works same overclock settings with gtx1060 6gb so their temperatures are high. Normally they works 1-2°C hight temparature than gtx1060 6gb.