Got a Zotac 3090 off their site a few weeks ago. It is running at 99MH consistently. Constantly thermal throttles. My MSI 3080 is getting 98MH and cost 1/2 the price. 
When it starts it will do 118MH but with in a minute it kicks the power down to 270w and runs around 98-104MH. Sucks.
If anyone has ideas let me know. I’m thinking of just selling it, trying to get two 3080 or three 3070s.
3090 has 12gb on the backplate make sure there are thermal pads and if you can add active cooling.
Problem solved.
Also undervolt
Took the backplate off. There was an entire row of memory with no pads for some reason. The other rows had it on both sides. I just repadded everything (2mm). So far running at full power for about 20 min @ 2100 memory. I’m getting 119.0mh consistently. I’ll keep playing with it, but so far seems solid. No more thermal throttling. CPU temp is 62. It what throttling before at 54 (cause the memory was overheating).
Thanks for the suggestion. Still a pig on power, but ETH @ $2K, I’m ok with that. 
is it Zotac 3090 AMP Core Holo 24gb ?
İ ordered one of them today. now im in doubt about that 
Honestly, the only 3080/3090s that are a safe bet to not thermal throttle out of the box are the EVGA FTW3s.
For $2k you could have tracked down 2- 3070s and gotten 120 -124 MH at no more than 240 watts, probably more like 230 watts with absolute core set at 1100
Hello , I have same card *8
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