Quick Answer
Sea of Thieves anti-cheat errors on RTX 4080 Super usually come from Easy Anti-Cheat repair, blocked files, overlays, Windows permissions, or a stale launcher session. Fix the service and file integrity first; RTX 4080 Super only becomes the focus after the game launches cleanly.
First Fixes to Run
Run the Easy Anti-Cheat repair from the game folder if available, verify files through the launcher, then restart Windows so the service reloads. If the message says untrusted system file, launch error, or service not running, write down that exact wording. Disable overlays and recording tools for the first retest.
Settings and Hardware Context
For SA buyers, a RTX 4080 Super setup often sits in the R35,000-R55,000 band, so the aim is to prove the real fault before spending more. use Quality upscaling at 4K before cutting textures. Pair the device with 16GB to 32GB RAM, a NVMe SSD, and a monitor target that matches the game rather than chasing unused performance.
When the Problem Is Not the GPU
If the issue follows one game only, keep working through launcher repair, file verification, overlays, and permissions. If several demanding games fail in the same way, then check temperatures, RAM, storage health, PSU headroom, and driver cleanup. Local warranty support and courier turnaround matter in South Africa, so collect clear evidence before escalating a hardware claim.
FAQ
What causes Sea of Thieves anti-cheat errors on RTX 4080 Super?
The common causes are service failure, damaged files, blocked permissions, overlays, or stale authentication. The GPU is usually not the direct cause.
Should I reinstall the full game?
Not first. Repair Easy Anti-Cheat, verify files, reboot, and disable overlays before using a full reinstall.
What FPS target should I test after the fix?
Use 60 fps as the first stability target, then move to 120 fps or the monitor refresh once launches are reliable.
Practical check
Keep one written baseline with driver version, FPS cap, error wording, and the exact test scene so the successful fix is easy to spot.