AX1600i + 3x RTX 3080 connectivity

[lesmil]

Hello guys.

 

I would like to ask here how to wire my AX1600i PSU with three RTX 3080 cards, please.

 

RTX 3080 cards I got are Palit 3080 GameRock OC, all of them with 3x 8pin connectors, TDP 370W each.

 

What would the best possible wiring option:

1.) PSU option 1 (PSU_1.png)

-2x single 6+2pin cable from PSU

-1x dual 6+2pin cable from PSU (1x 6+2 connector goes to GPU and second 6pin daisy chain goes to riser)

 

2.) PSU option 2 (PSU_2.png)

-1x single 6+2pin goes to GPU from PSU

-1x dual 6+2pin goes to GPU from PSU (daisy chain)

-1x single 6pin goes to riser from PSU

 

Thank you very much for reaply.

Edited February 19, 2021 by lesmil

[Vegan]

AX1600 has 10 PCIe plugs leaving one for the EPS12V, so 3 cards are possible but it's a tough load for the machine

[lesmil]

Thank you very much for reply. I know it is going to be tought but I will try to keep cards at 225W each (as it is going to be used for "badword").

 

If I am right, wiring each card with 2x single 6+2pin should give card 300W, 1x daisy (so 6+2pin would go to the card with 75W - together 375W and 6pin from that that daisy cable to the riser - 75W). But I am not sure if it is ok to plug one end of daisy to GPU and second one to the riser :/.

[Vegan]

Beware that the RTX 3080 can use much more power when pushed up to the thermal limit of the machine.