EVGA 3080 xc3 ultra is very little ultra.
This card has a big power problem!
It basically takes too much current from the pcie and too little from the 2 PSU connectors.
In practice it goes into Power limit before 320 w when it should reach 340 \ 366 instead.
It is a big problem for the boosts which are limited, it is also a problem for the safety of some motherboards as the power spikes on the pcie could put stress on the board and other components on it.
EVGA worked very badly, I hope it can be resolved soon with a BIOS upgrade otherwise on January 31st, fortunately limit time given by Amazon for purchases in this period , I will go back it immediately.
For now I set limit tdp to 300W for safety to avoid doing damage.
I was from a very good Turing EVGA, but with ampere they made quite a mess.
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