i tried my 1050 ti with their app, of course without any modification, on windows 7 and you may not believe the result,
 

it was showing around 200h/s 

so i thought its best to just uninstall their app and think about a real miner.

but today after i turned my pc on again, the nicehash miner came up ans started working while i had uninstalled it the day before   

now i have 4 giga 1050ti and 2 giga 970 which will use for gpu mining and few i7 4770k for cpu mining when my they are free at nights

i hope to get some results near the op stat

idk man thats sketchy
i honestly got rid of all my 1050ti's as i only had sata risers and they will burn up, even at 70% power
Not safe man, not having external pins sucks, use PCI-E connectors or cry later
plus, ugh, 1050ti makes like 75cents a day now :/

Usually one molex of power cable can power up to 3 sata risers, but you can check with your PSU to see if each molex can draw more power for more risers.