I started to mine back in January 2022 and everything went smooth until late last week where my GeForce RTX 3090 24267 MB stop working.
I reduced the memory from 2100 to 1130 already but its still the same, it was on for a few hours then stop working now.
I am sti a newbie here 
Switch to locked core clocks on all cards, 3090 only needs about 1140mhz to get full hashrate, and reboot. No need to use power limits with locked clocks as well. If that doesn’t help, replace the riser/cables
HI @keaton_hiveon , thank you for the advice. I have changed the riser and change to 1140mhz but sadly its still not work. The lights on the GPU keeps blinking and all fans are off. I tried that GPU on other mother board running on windows and it works fine.
try it directly on the board, make sure all power cables and riser is known good
the issue comes from the psu cable meltdown 
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