> ## Documentation Index > Fetch the complete documentation index at: https://docs.xbox.com/llms.txt > Use this file to discover all available pages before exploring further. # Gaming Sustainability Minecraft Case Studies > Mojang's Minecraft Java FPS limiter for AFK and minimized states cuts power up to 75%, plus a console framerate cap on controller-disconnect dialogs. **Studio:** Mojang\ **Shipped:** August 2024 (Java snapshot)\ **Contributors:** Nick Horvath (Engineering Systems Manager), Sue Loh (Performance Tech Lead), Timur Nazarov (Java), David Ekermann (Bedrock) > [!NOTE] > > **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](https://www.epa.gov/energy/greenhouse-gas-equivalencies-calculator)). A modest 10% efficiency win at scale is substantial. Globally, PC gaming consumes \~230 TWh of electricity per year — equivalent to 59M EU households. In the US, gamers spend \~\$6B on electricity and emit \~12M tons of CO₂ annually. Mojang set out to reduce Minecraft's contribution to that footprint. ## 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. Unlike a global FPS cap, this only engages when the player isn't actively playing. ### AFK mode measurements (NVIDIA GeForce RTX 3080, GPU-only) | Version | Gameplay | Idle \< 1 min | Idle 1–10 min | Idle > 10 min | | - | - | - | - | - | | **1.21 (old)** | 101 W | 93 W | 93 W | 93 W | | **FPS Limiter (new)** | 100 W | 82 W | 32 W | 25 W | | **OS idle baseline** | 17 W | 17 W | 17 W | 17 W | After 10 minutes of inactivity, Minecraft draws roughly what the OS itself needs — a **\~73% reduction** vs. the old idle baseline. ### Minimized measurements | Version | Gameplay | Minimized | | - | - | - | | **1.21 (old)** | 101 W | 134 W | | **FPS Limiter (new)** | 100 W | 25 W | > [!NOTE] > > 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 | Device & area | Screen time | Median FPS | | - | - | - | | Windows | 7.1% | 60 | | XBOX One: controller-disconnected screen | 14% | 60 | | XBOX One: pause screen | 1% | 60 | | XBOX Series: controller-disconnected screen | 10.6% | 60 | | XBOX Series: pause screen | 0.5% | 60 | The team dropped the framerate on the controller-disconnected dialog to **10 FPS** after 60 seconds visible. Measured via PIX Power Monitor: | Console | Active gameplay | Stage 1 (60 FPS dialog) | Stage 2 (10 FPS dialog) | | - | - | - | - | | **XBOX Series X** | 24% (102 W) | 21% (89 W) | 17% (81 W) | | **XBOX Series S** | 31% (62 W) | 26% (52 W) | 19% (48 W) | 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. ## Related case studies * [Fortnite & Unreal Engine](https://docs.xbox.com/build/game-principles/sustainability/case-studies/case-studies-fortnite.md) * [Call of Duty](https://docs.xbox.com/build/game-principles/sustainability/case-studies/case-studies-cod.md) * [The Elder Scrolls Online](https://docs.xbox.com/build/game-principles/sustainability/case-studies/case-studies-elder-scrolls-online.md) * [Energy Efficiency Essentials](https://docs.xbox.com/build/game-principles/sustainability/energy-efficiency-essentials.md) ## Related topics - [Gaming Sustainability For Honor Case Study](https://docs.xbox.com/build/game-principles/sustainability/case-studies/case-studies-for-honor.md) - [Gaming Sustainability Star Wars Outlaws Case Study](https://docs.xbox.com/build/game-principles/sustainability/case-studies/case-studies-star-wars-outlaws.md) - [Gaming Sustainability Fortnite Case Study](https://docs.xbox.com/build/game-principles/sustainability/case-studies/case-studies-fortnite.md) - [Sustainability case studies overview](https://docs.xbox.com/build/game-principles/sustainability/case-studies/case-studies-overview.md) - [Gaming Sustainability Call of Duty Case Study](https://docs.xbox.com/build/game-principles/sustainability/case-studies/case-studies-cod.md)