I ran the biostar z170 with 4 rx 480's no risers it gets hot
the setup I did with 3 cards above is pretty much fool proof zero heat issues 2300-2400 for skein only 550 watts.
it will run on the biostar z 170
it will run on the gigabyte z270
my rack can hold 6 rigs that would be more then 6 x 2200 = 13200 for skein or 6 x 1800 = 1080 for zec at 6 x 550 watts = 3300
I would be earning over 150 usd a day for that power.
btw the evga psu you link is a good one for one of these rigs.
I plan to have 6 rigs on that rack
1)1080ti 1080ti 1070 4)1080ti 1080ti 1070
2)1080ti 1080ti 1070 5)1080ti 1080ti 1070
3)1080ti 1080ti 1070 6) 1080ti 1080ti 1070
I bought 4 rosewell 850's yesterday, I might return them and get the EVGA's I really like the looks of them! Thanks for the link scryed
Also the 2x1080Tix1x1070 is pretty nifty, I might have to try that out! Space is getting crowded with all these 2 card rigs I need to bump up to 3+ ASAP.
Ordered 10 more TI's today. 10 Yesterday. The inventory is growing.

I used the rosewills they are good.
I have not used that particular evga. it has a nice price.
I need to see all my mobos to figure how many
2x1080ti's
1x1070's
I can build.
the heat on them is good.
I have 1 more 1080ti and 1 more 1070 coming
I will do a third build like this.
giving me three riser free builds.
that rack is 18 inches deep and 36 inches high
fitting 6 mobos and 18 cards will be easy
in the winter I ran 6 mobos with 24 cards but they ran hot. about 7200 sols for zec and the panda miner did 2200 = 9400 sols 22 amps of 240 volts = 5280 watts.
I now do 10 amps x 240 = 2400 watts and this would be 8000 sols I have to stay low watts for summer.
I could not run 5 2 card no riser computers in a room, what I had to do was stack them up against the window and have the GPU's blow out the window. It literally fills the window sill from top to bottom - my neighbors have already come by asking me wtf am i doing lol.
They know I'm up to no good - I had 50 Time Warner Cable ISP connections at my house, 50 wifi routers on 50 different cable modems and lines, and it knocked all the wifi from a 3 house radius out - nobody that lived 3 houses in any direction from me could get a signal. That went on for 3 years. They're still upset, but don't 100% know it was me.