Nintendo Switch 2 Kingdom Hearts 3 Performance Drops to 30 FPS

The Nintendo Switch 2 version of Kingdom Hearts 3 runs significantly worse than the PlayStation 5 backward compatibility build, according to early performance data. The game often dips into the 30 FPS range on the handheld console while Sony's system maintains a steady 60 FPS. This gap highlights how legacy engine choices limit the new hardware's ability to punch above its weight in ports.

Early performance data reveals frame rate fluctuations on the new console

Square Enix is releasing Kingdom Hearts 3 as part of the Kingdom Hearts Collection [I~III] for Nintendo Switch 2. The title uses an older Unreal Engine 4 build that does not support NVIDIA DLSS upscaling technology. The lack of modern rendering features removes a key advantage the Switch 2 would typically have over previous generation hardware.

The game relies on dynamic resolution scaling to manage performance across different play modes. Players see a dynamic 1080p resolution in handheld mode and a dynamic 1224p resolution when docked to a TV. The reduced resolution targets help explain the frame rate fluctuations seen in actual play sessions.

Early demos suggest the final retail version may perform much better than current builds show. Square Enix previously improved Final Fantasy VII Rebirth significantly after its demo phase, which sets a precedent for this pattern. The Switch 2 port could see optimization improvements before launch.

The Kingdom Hearts Collection launches on Nintendo Switch 2 ahead of October. The upcoming launch period provides an opportunity for the development team to refine gameplay stability via updates and final tuning. Players waiting for the collection will get updated builds when the game ships.

Kingdom Hearts 3 runs on a legacy Unreal Engine 4 build without DLSS support, which limits its performance on Nintendo Switch 2. The handheld version often drops to 30 FPS while PlayStation 5 backward compatibility holds 60 FPS. Dynamic resolution scaling targets 1080p in handheld mode and 1224p when docked. Square Enix may improve performance before the October launch, following patterns seen with Final Fantasy VII Rebirth.