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.
I hope they can make a 8 slots MB now.