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ROG STRIX RTX 4090 OC Black Screen Flickering

mrblithe
Level 7
Hi.
I recently built a new PC and I'm experiencing black screen flickering, where the monitor loses signal and comes back after 2 seconds. This happens randomly in games and in Windows.
 
Here's what I've checked and tried so far:
- BIOS is up to date.
- Nvidia driver is up to date (version 551.52).
- I've tested with different DisplayPort and HDMI 2.1 cables, but the issue persists.
- G-SYNC is on, and adaptive sync is enabled on the monitor.
- Monitor firmware is up to date.
- All connections (PSU, PCI) are secure.
- XMP is enabled, and there are no issues with games and stability. I've also run stability tests like memtest, furmark, and karhu ram test.
- I tried to update the firmware with the Nvidia UEFI firmware updater, but the issue persists. (I also have a problem where there is no signal until Windows completely boots.)
- HDR on or off doesn't make any difference.
 
Here are my PC specs:
- Motherboard: Asus Z790 Maximus Hero
- CPU: Intel i9 14900K
- RAM: G.SKILL 64GB (2x32GB) Trident Z5 RGB 6400MHz CL32 DDR5 1.4V
- GPU: Asus ROG Strix GeForce RTX 4090 OC Edition 24GB GDDR6X
- PSU: MSI PSU MEG AI1300P PCIE5 1300W 80+ PLATINUM
- Cooler: Corsair iCUE H150i Elite LCD XT CW-9060075-WW 360mm
- Monitor: Samsung Odyssey G7 4K
 
I'd appreciate any advice or suggestions on how to resolve this issue. Thank you!
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