Random FPS drops in Minecraft with RTX 5080 + Core Ultra 7 265K (GPU shows 100% but not actually working hard?)

Hey everyone,

I’ve been having a really weird issue with Minecraft lately and I’m hoping someone here might have an idea what’s going on. (Even tho i don’t use Dynamic FPS)

My setup is pretty high-end: (I run on 4K oled monitor)

•	GPU: RTX 5080

•	CPU: Intel Core Ultra 7 265K

•	RAM: 32GB DDR5

Normally Minecraft runs completely fine, but randomly my FPS drops hard even though the game usually runs smoothly.

The strange part is that my GPU usage jumps to 100%, but it doesn’t actually seem like the GPU is working that hard. The fans don’t ramp up and it definitely doesn’t sound like it’s under heavy load (usually when my GPU is fully used it sounds like a jet engine).

So it feels like the game thinks the GPU is maxed out when it really isn’t.

Some extra info:

•	FPS normally: high (100+)

•	When the issue happens: sudden drops and stutters

•	GPU usage shows 100% in monitoring tools

•	GPU temps and fan noise stay pretty low

•	Happens in fullscreen only 

•	Playing Java Edition (via Modrinth)

Has anyone experienced something like this before?

Could it be a driver issue, mod conflict, Minecraft setting, or something with GPU scheduling?

Any help would be appreciated!