I cant use 5x4090 turns off if run hashcat with the parameter -O

[Sondero]

p.s
I lowered the power limit to 60%.
That didnt solve the problem
if 5 GPU are connected, it turns off and reboots

Perhabs your problem is not the main power supply from the GPUs (3x 8Pin), rather the power that the cards need from the PCIe-Port.

PCIe can spend 75W (no idea how much the 4090 need) , perhabs your mainboard couldnt give 5x 75W to the x16-Slots



if you are not sure, you can easyly test it with powered X1->x16 Riser cables (but you should use this cables only for testing )