14 gpus  if they were 14 1080 ti's  founder edition  with a tdp set at 70%  it would be 250 x .7 = 175 watts per gpu x 14 = 2450 watts

so the server psu ibm  2880 or 2980   with a pico psu attached   and 20 cables   would be short cables not power.


finksy's 2 x 2000 watt 4k psu would be good  as it has 30 cables.

it will be fun to see it working.

If you are like me  with 12 -15 working loaded mobos that can do 50 psus you would not need this.

but if you are going to open a farm  and want 10 of these running 140 gpus it is nice.

depends on price and cpu needed.