Thanks RoasterMen for your input. Budget is low for him and he came up with this option. Just want to know, if this card can handle modern games easily.
I have a Asus GTX680-DC2O-2GD5. It can handle modern highest-end games such as "The Witcher 3" on medium/high settings easily indeed, meaning about 35 to 40 frames/second. On a 60Hz monitor, 60 FPS would be to die for, but that's not realistic with this card with - again - most demanding games. Far Cry 4 on highest settings just made it to 60 fps. Sometimes a notch less, and sometimes a notch more. Prey (2017) runs with ease as well, though your friend is going to pay a huge price with sync enabled. Assassins creed it can handle on highest settings I believe as well - can't remember settings but it ran smoothly.
Modern RTS it will handle with ease, even those known for being demanding.
All of the games were running on my unusual native resolution of 1920x1200. Expect same results on a 1080 resolution.
The advantage of the 1050, besides modern tech which require less power and is better at NVidia's (failed) Hairworks, is that it has 4GB ram instead of 2 like the 680. With this your friend could easily use 8xMSAA in more cases than I would for example. Or you could use higher detailed textures in combination with AA, MSAA and whatnot, more easily than I would. It's the only difference. In other words, more memory will cause less bottlenecks at higher resolutions or highest texture details. As long as the memory is not used above 2GB (which is rare), you won't notice a difference.
If your friend plays on a 2K or 4K monitor, then it's game over for the 1050 anyway, although 4GB of ram by itself is sufficient for a 2k resolution.
So would I recommend the 1050 series (including the Ti versions)? No. The 680 which I bought was the best investment I ever made. It's still running like a champ. I just mentioned the games I played. However, I sense it's end is nigh.
Again, the context here is only the graphically most demanding games.
It is my assessment that 1070 is the way to go, 1080 is the luxury way to go (4K), and 1060 is the budget alternative. I wish I had a more favorable answer for your friend but I don't want to sell you a story just so you and your friend feel good for the wrong reasons.
I guess ASUS P8 Z77 V Pro can handle this card, with 1000W PSU?
You can handle anything with 1000W. I have 1000W. I'm modding and everything and it's still overkill. Secondly, that mobo has a pcie 3.0 port wich is very advisable of course, though since these ports are backwards compatible, a 2.0 would have worked as well (don't do it lol).