Shipped: August 2024 (Java snapshot)
Contributors: Nick Horvath (Engineering Systems Manager), Sue Loh (Performance Tech Lead), Timur Nazarov (Java), David Ekermann (Bedrock)
Impact math: A title averaging 160 W played 3 hours/day for a year consumes ~175 kWh per device. Across 100k devices, that equals GHG emissions from ~13.5M pounds of coal burned (EPA calculator). A modest 10% efficiency win at scale is substantial.
Java: the “Reduce FPS when” setting
A new video setting introduces two modes:- Minimized — caps framerate at 10 FPS when the window is minimized.
- AFK (default) — caps framerate at 30 FPS when no player input for over a minute, then further to 10 FPS after 10 minutes total. Also caps at 10 FPS when minimized.
AFK mode measurements (NVIDIA GeForce RTX 3080, GPU-only)
After 10 minutes of inactivity, Minecraft draws roughly what the OS itself needs — a ~73% reduction vs. the old idle baseline.
Minimized measurements
The old build actually drew more power when minimized (134 W vs. 101 W in gameplay) — the game continued to render offscreen at full framerate. The new build drops it to 25 W.
Console: controller disconnected framerate cap
Minecraft telemetry showed the Controller Disconnected dialog was on screen surprisingly often, and the game still rendered it at a full 60 FPS.Screen time by platform
The team dropped the framerate on the controller-disconnected dialog to 10 FPS after 60 seconds visible. Measured via PIX Power Monitor:
The experiment was validated and the change is being made permanent for the single-player scenario in an upcoming Bedrock release, with future work planned for multi-player scenarios and additional dialogs.
Tools used
- HWInfo — PC GPU-only power measurement.
- PIX Power Monitor — XBOX console measurement.
- Certification testing — controlled repeatable capture.
Takeaways for other studios
- Instrument for wasted power first. Telemetry showed the disconnected-controller dialog was on screen 10–14% of XBOX playtime.
- Rendering something the player isn’t looking at is pure waste. Minimized windows, disconnected controllers, and long idle sessions are all candidates.
- Stage your idle drops. 30 FPS after 1 minute, 10 FPS after 10 minutes preserves responsiveness for players who return quickly.