Let him invest anything he wants. If he loses its his problem. Maybe this will teach him a lesson about doing some research before investing

It may be difficulty change

Look for full size MSI or other brands. Zotac mini will run much hotter and louder due to smaller heat dissipation area

How many of them will you have?

Just like a bitcoin LTC won't be profitable on any GPU

Zec ~350-380 depends on your setup

Currently ETH, if correction is over price will skyrocket again

All 1070 should have the same hasing power. The only difference you ll notice is that Turbo cards ll sound like freaking F-16 Jet Fighter
 

You dont need to have PhD in programming to mine. Buy some GPUs, good PSU, decent CPU with rest of the equipment and you're ready to go
 

Corsair and EVGA are best in class (except Seasonic). Both companies have very long warranty on their products. Personally I have Corsair RM series and I'm quite amazed with build quality.

If I'm not mistaken Palit and Gainward are exactly the same thing. Bear in mind that these cards are HUGE. Palit also have 3y warranty.

Is this card new or used? If you can try to plug her into different system (could be even friend's PC) abd run some benchmarks. It could be card's by itself fault.

PCI-E can supply only 75W. 1050ti consume about 50-60W

Try google maybe
There are many threads like this and you didnt even bother to look for them....

Both MSI and Palit have got very good cooling solutions. You should definitely check them out. Palit is also one of the cheapest cards manufacturer and comes with 3y warranty.

1500W? Walk in the park...

3m warranty? Somethings is fishy here...

IMO even if this ll work, there wont be enought airflow to properly cool GPUs

To prevent catching fire when mining regularly check your system temps. Also you cant cheap on PSU or risers. Many people forget about this, buy the cheapest that they can find on market and called it a day.

What version of drivers you have?
Are you sure that you correctly configured miner? And what is your gpu usage during mining?