[NAME] [NAME] Noticed the new 1.0.0.3 VBIOS was posted today. Just installed it and it fixes the issue. Tested 5 reboots at 240Hz @ 5120x1440 on my Samsung Odyssey Neo G9 and it was good to go.
After spending 2 days testing over and over and reading every single message out there on the interwebs, i'm concluding this as a fact that Dell Alienware R12 with Intel process/Nvidia 3080 video card is not sending signal to the Odyssey monitor during post if the monitor is set at 240Hz. There's nothing wrong with DP1.4 cable that was included and i know that as a fact since another dell monitor is connected through HDMI and neither of them would work if the signal is set at 240Hz. Once i unplug the DP cable from the card, computer boots fine, once it booted, i can connect the cable and monitor will turn on. So nothing is wrong with the monitor, nothing is wrong with the latest nvidia driver, doesn't matter if this is Windows 10 or 11. I tried every single test in the book. Also, absolutely everything else works once the monitor comes on at 240Hz - 10 bit color, G-Sync enabled, Hrd on or off, so everything works perfectly with the existing signal once it's passed to the monitor... It's very sad that either this is an issue with BIOS firmware or video card bios, both owned by Dell. Calling tech support is useless, they follow the script. I've been in this business for 30+ years, so i consider myself very technical. However, these monitors with 240Hz are fairly new, so many people are seeing this issue. I would love to get this fixed so i don't have to set my pc to sleep mode. It works then just fine, but if OS updates and i need to reboot, basically i have to set the monitor at 120Hz, reboot and then set it back to 240hz. If i don't do that, it won't post, and i have to unplug DP cable. Dell support, I'm all ears with your help here. 
Aurora R12, 3080, Samsung Odyssey G9, won't post at 240Hz