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

[Snoopy]

I use this hardware:
5x4090 msi ventus
motherboard asus pro ws w790e-sage se
cpu xeon w5-3425
ram 64
power supply super flower 2x2000w
win 10

power supplies are connected like this 2x4090(motherboard+cpu+pcie8pin and 6pin)+3x4090 on the other power supply
Im using x16 raiser gen 4.0
if you run benchmark hashcat with parameter -O
hashcat.exe -b -w 3 -O
there is a click power supply and the system reboots.
If you run benchmark without the -O parameter everything will be successful and the system will not reboot.
If you remove one gpu leave 2x4090+2x4090 then everything works.
tried 3x4090(motherboard+cpu+pcie8pin and 6pin)+2x4090 does not work, also reboots with parameter -O
3x4090(motherboard+cpu+pcie8pin and 6pin)+1x4090 works!
Help where to dig, what to do?

And as you might have realized, it doesn't work with 5 video cards. If I plug in 4 or less, everything works.
All video cards have been tested to make sure they work.

well this sound more like a hardwareproblem, not related to hashcat itself

due to the mentioned "click" and reboot i think you have some problems with your PSUs (overload in powerconsumption) or some weird driver problem, you can try to turn off automatic reboot on failure in windows, so that you can actually see the "maybe" BSOD, driver problems mostly result in IRQL NOT LESS OR EQUAL errors.