Well, I found the problem:
that was the PSU connector that powered the 3080. I used an Y splitter to get 3 ports powered but that was a stupid idea because I wasn't aware of the fact that unlike on linux, in windows clocks and powerlimits might reset which results in the rig pulling max wattage.
In that case, a 3080 with 320W TDP is too much for a single PCIe 8Pin cable that specifications are capped at 288W
Lucky me, it is just the PSU and not the whole rig or even worse, my whole house...
that was the PSU connector that powered the 3080. I used an Y splitter to get 3 ports powered but that was a stupid idea because I wasn't aware of the fact that unlike on linux, in windows clocks and powerlimits might reset which results in the rig pulling max wattage.
In that case, a 3080 with 320W TDP is too much for a single PCIe 8Pin cable that specifications are capped at 288W
Lucky me, it is just the PSU and not the whole rig or even worse, my whole house...