A 120fps target in Sea of Thieves at 1080p on an RX 7800 XT is comfortably below the card's ceiling, so this is about a locked, consistent feel rather than wringing out performance. The card routinely runs the game well past 150fps here.
Quick Answer
At 1080p, the RX 7800 XT delivers 150 to 200fps in Sea of Thieves, so a 120fps cap is easy and leaves thermal and power headroom. Set a 120fps Radeon Chill cap on the High preset for a silky, low-power experience that suits a 120Hz or 144Hz panel.
Locking A Smooth 120fps At 1080p
Run the High preset with Shadows High, Water Detail High, and Render Quality 100 percent. Apply a 120fps Radeon Chill cap (min and max 120) so the GPU coasts and stays cool. Enable Radeon Anti-Lag for tighter input response in PvP encounters. The RX 7800 XT's 16GB VRAM means you never compromise on texture quality at this resolution.
What To Spend Your Rand On
The RX 7800 XT is more card than 1080p Sea of Thieves needs, so this build only makes sense if you also target 1440p AAA gaming. Pair it with a Ryzen 5 7600 or Ryzen 7 7700 and a 650W 80+ Gold PSU for the ~263W draw. If 1080p is truly your ceiling, a cheaper card would suffice; otherwise this is solid future-proofing stocked at Evetech.
FAQ
Is 120fps easy to hit in Sea of Thieves on an RX 7800 XT at 1080p?
Very. The card averages 150 to 200fps here, so a 120fps cap runs cool and quiet with frames to spare.
Should I use a frame cap or V-Sync for 120fps?
Use a Radeon Chill cap at 120 rather than V-Sync; it reduces input lag while preventing the GPU from running flat out for frames a 120Hz panel cannot show.
Will a cheaper GPU also hit 120fps in Sea of Thieves at 1080p?
Yes, several mid-range cards manage it. The RX 7800 XT only earns its price if you also game at 1440p or 4K, where its 16GB VRAM and grunt matter.
Cap Sea of Thieves at 120fps with Radeon Chill and enable Anti-Lag on your RX 7800 XT for a cool, low-latency 1080p experience; pair it with a 144Hz panel from Evetech for future headroom.