If you are experiencing RTX 3080 crashes to black screen while playing ARK Survival Evolved, here are 12 things to try:

1. Update your GPU drivers — make sure you have the latest drivers from Nvidia.
2. Update your OS and motherboard firmware — ensure Windows and BIOS are up to date.
3. Disable antivirus and GPU software — temporarily disable any overlay or monitoring software.
4. Monitor your temperatures — use HWMonitor to check GPU and CPU temps.
5. Run a hardware diagnostic — test your RAM and GPU for errors.
6. Use proper power cables — do not use adapters or daisy-chain cables.
7. 1000W PSU is barely enough — the RTX 3080 has massive power spikes.
8. Lower your game settings — especially shadows and textures.
9. Verify game files — use Steam to verify ARK's installation.
10. Use a single monitor — multi-monitor setups can cause issues.
11. Remove USB graphics adapters — these can conflict with the GPU.
12. Reinstall the game — ARK is 475GB, a fresh install may help.

I experienced this issue for a whole month before finding a fix. Hopefully one of these steps helps you.