Take a look here:
https://www.reddit.com/r/EtherMining/wiki/hardware/risers6-pin PCI-e Power cable is rated for 75 watts/13 amps, the same amount given by the PCI-e lane on the motherboard
Molex is rated for 132 watts/11 amps
SATA is rated for 54 watts/4.5 amps. - Do not convert from SATA to Molex/6-pin, this will cause an overdraw and could result in a fireI just post above what you can see on the website
the PCI Express power connectors on the graphics card. There are two types of power connectors:
6-pin: this power connector can provide up to 75 watts
8-pin: this power connector can provide up to 150 watts
I did not remember the power draw of 1070ti, but for all the rigs you have, you should read above, understand and do the adjustments
I used to have 1 sata cable delivering power to 3 risers, and my system was very unstable, now I know that if you use sata cable to power your rise, it's better to have only 1 connected
If you have molex cable to power your rise, it's way better