Performance tweaks keep your CPU and power plan awake and responsive — reducing micro-stutters when load spikes in games.
Why it matters
Modern CPUs clock down aggressively at idle. When a game needs power, waking cores causes hitches. Ultimate Performance + core parking off + USB suspend off fix this for most systems.
Available tweaks
| Tweak | Tier | Risk | Recommended | Description |
|---|---|---|---|---|
| Ultimate Performance power plan | Free | Safe | Yes | Enables the hidden Ultimate Performance plan for higher, steadier CPU clocks. |
| Disable CPU core parking | Free | Safe | Yes | Keeps all CPU cores awake so games never wait for cores to spin up. |
| Disable USB selective suspend | Free | Safe | Yes | Stops Windows from sleeping your mouse, keyboard and USB devices. |
| Disable power throttling | Free | Safe | Yes | Prevents Windows from throttling apps to save power. |
| Disable hibernation | Free | Safe | No | Frees disk space and speeds up shutdown. |
| Disable startup app delay | Pro | Safe | Yes | Removes the artificial delay before startup apps launch. |
| Foreground priority boost | Pro | Advanced | Yes | Gives the active app (your game) more CPU time. |
| Aggressive CPU boost mode | Pro | Safe | Yes | Sets processor performance boost to aggressive. |
| Disable memory compression | Pro | Advanced | No | Reduces CPU overhead on high-RAM systems (16GB+). |
How to apply
Open IRIS Tweaks → Optimizations → Performance. Toggle individual tweaks or use Dashboard → Optimize now for all recommended tweaks in your tier.
Advanced
Foreground priority boost and memory compression disable are marked Advanced. Memory compression off is mainly for 16GB+ RAM systems.