Really weird issue... So when I first installed the 3090 the LED's on the card worked fine and synced with Armoury Crate just fine. However, after turning off the computer during the night when I turned it on this morning I noticed the LED's on the card were completely off during boot up and when windows was up and running. I launched armoury crate and it detects the card, but changing the lightning effects has no effect on the graphics card.
My last resort was I turned off the computer and manually switched the PSU to off and waited about a minute. After doing so, I turned on the computer and voila LED's on the graphic's card is on and running just fine. Turned the computer off while I went to work and just turned it on after an 8 hour day and the same thing is happening again!!!
13900KS | Z790 Apex | GSkill DDR5-8000 | Gigabyte 4090 Gaming OC