Advise PSU requirements for 2 x 13 GPU rigs

[umax]

Hi,

after 2 weeks reading & researching and finally able to source 26 GPUs (it was hard time here in EU), I have everything being shipped to me, I just need to order PSUs.

My 2 13 GPUs rigs will be powered each by 4 PSUs. I want them to be stable with stock GPU voltages, so this is my starting point. Afterwards I will limit power and get into sweat spot for hash/power consumption.

Rig 1 will consist of;

13 x EVGA GTX 1070Ti SC (single 8 pin power connector)
Asrock H110 Pro BTC+
Intel i3 3.9GHz (7th gen - Kaby Lake)
8 GB DDR4 2133 ram
9 Delta 120 x 120 x 38mm fans

Here I thought to power whole system with 4 x Corsair AX860 PSUs (3 PSUs powering 4 x 1070ti each, the 4th one would power 1 x 1070ti and the rest of the system (CPU, Mobo, Fans, Risers).

Rig 2 will consist of;

13 x EVGA GTX 1080Ti SC (8 pin + 6 pin power connector)
Asrock H110 Pro BTC+
Intel i3 3.9GHz (7th gen - Kaby Lake)
8 GB DDR4 2133 ram
9 Delta 120 x 120 x 38mm fans

Here I thought to power whole system with 3 x Corsair AX1200i PSUs (3 PSUs powering 3 x 1080Ti each) and Corsair AX1500i to power 4 x 1080Ti and the rest of the system (CPU, Mobo, Fans, Risers).

Can you please advise if my choices regarding power requirements are correct, or I have maybe over powered the rigs. What would be  best suggestion for my situation?

[spinx]

As the price of ATX PSU's has skyrocked, i would suggest using server psu with breakoutboard:

Buy a complete kit or build your own.

https://www.parallelminer.com/product/build-your-delta-platinum-94-1400watt-200-240v-power-supply-kit-for-gpus-mining-zec-dash-eth/

or find a pus 40-60$ on ebay + breakout board 15-30 $

[umax]

As the price of ATX PSU's has skyrocked, i would suggest using server psu with breakoutboard:

Buy a complete kit or build your own.

https://www.parallelminer.com/product/build-your-delta-platinum-94-1400watt-200-240v-power-supply-kit-for-gpus-mining-zec-dash-eth/

or find a pus 40-60$ on ebay + breakout board 15-30 $

How many 1080Ti (default voltage) can I power with one 1400W server psu? And how many 1070Ti?

[spinx]

As the price of ATX PSU's has skyrocked, i would suggest using server psu with breakoutboard:

Buy a complete kit or build your own.

https://www.parallelminer.com/product/build-your-delta-platinum-94-1400watt-200-240v-power-supply-kit-for-gpus-mining-zec-dash-eth/

or find a pus 40-60$ on ebay + breakout board 15-30 $

How many 1080Ti (default voltage) can I power with one 1400W server psu? And how many 1070Ti?

Can run 4 x 1080 Ti per 1200W to be safe. 1080 Ti draw about 250-300 watts each depending on settings.

So if you go with 6 x additional 1200W PSU, thats 7200W / 26 ~ 276W per card.

To be safe, i say 1 x 750W for the system + 1 card and then another 3 x 1200W for the remaining 12 cards per rig. Then you have 300W per card easy.

The HP 1200W models are about 60Euro/each. https://www.ebay.com/sch/i.html?_sop=15&_from=R40&_sacat=0&_nkw=HP%201200W&rt=nc&LH_PrefLoc=5&_trksid=p2045573.m1684

Price compare

Standard ATX
6 x EVGA SuperNOVA G2 1600W (3 per system) ~ 2100 Euro (~350 each) = 2100 Euro total

vs

Build your own from server PSU
2 x EVGA SuperNOVA G2 750W (1 per system) ~ 200 Euro (~100 each)
6 x HP 1200W (3 per system)  ~ 360Euro (~60 each)
+ 6 x breakout boards ~120 euro (~20 each) (even cheaper i bought from Aliexpress)
+ cables 100 euro (even cheaper i bought from Aliexpress)

vs

Buy complete custom server psu kits
6 x 'GOLD RATED 1200 WATT 110-240V POWER SUPPLY KIT FOR GPU’S MINING' (includes board & cables) ~ 600 Euro (~100 each)
https://www.parallelminer.com/product/hp-gold-rated-1200-watt-110-240v-power-supply-kit-for-gpus-mining-zec-dash-eth/