RGB Engine
Get notified
Lightweight RGB software for Windows
RGB Engine lights your whole case, fans, RAM, LED strips and cooler, from one small app. While your lights run it uses under 15 MB of RAM and well under 1% of your CPU, so your games get the rest.
Get notified at launchWhat RGB Engine uses
Measured with Task Manager on the same 16-thread gaming PC, while each app was running lights.
- RGB Engine
- Under 15 MB, 2 processes
- SignalRGB
- ~1.5 GB, 13 processes
| Process | What it does | Memory |
|---|---|---|
| rgb-engine.exe | Runs your looks, listens to your music | 1 to 4 MB |
| OpenRGB.exe | Talks to your fans, RAM and strips | 4 to 11 MB |
| The window | Only runs while it's open | Nothing once closed |
| Together | While your lights run | Under 15 MB, well under 1% CPU |
Task Manager's Memory column on the same 16-thread gaming PC, October 2026. Windows trims both processes when they sit idle, so you'll often see less. SignalRGB measured with Task Manager on the same PC in September 2026. Full SignalRGB comparison
Why most RGB apps are heavy
Some RGB software is built like a website running inside your PC, with a full browser engine underneath. That's how SignalRGB ended up as 13 processes on our test PC.
Then there's the pile. Your motherboard, RAM, fans and cooler can each come with their own lighting app, and every one of them starts with Windows and keeps a service running in the background, even when you never open it.
How RGB Engine stays light
The lights run on a small native engine written in Rust. It listens to your music, updates your lights at a steady pace, and that's it.
The window is a separate program that only exists while it's open. Close it and only the lights keep running. If the window is open but you're not using it, it goes to sleep.
One app covers every brand, through OpenRGB, which comes included. Your mic, keyboard and mouse are left alone unless you switch them on. There's also a power saver mode for older PCs that halves how often the lights update.
Get notified at launchCheck it yourself
- Open Task Manager and go to the Details tab.
- Find every process from your RGB apps, including background services.
- Add up the Memory column, and watch the CPU column for a minute while your lights run.
Once RGB Engine is out, do the same with it. We'd rather you check than take our word for it.
Questions
What is the most lightweight RGB software?
RGB Engine is built to be one of the lightest: under 15 MB of RAM and well under 1% CPU for the whole case, measured on a 16-thread gaming PC. OpenRGB on its own is free and light too. In fact it's most of RGB Engine's footprint, because RGB Engine ships it inside to talk to your hardware. OpenRGB is a device tool with basic effects, and RGB Engine adds over 100 designed, music-reactive looks.
How much RAM does RGB software use?
It varies a lot. On the same gaming PC, SignalRGB ran 13 processes and about 1.5 GB of RAM, while RGB Engine ran on under 15 MB including OpenRGB. Vendor apps add up too, because each brand usually brings its own app and background services.
Does RGB software lower FPS?
Average FPS usually barely moves. What can suffer are the 1% and 0.2% lows, the short hitches you feel as stutter. Tests have shown worse lows with an RGB sync app running in some games. More on RGB software and stutter
How do I check how much my RGB software uses?
Open Task Manager, go to the Details tab and look for every process from your RGB apps, including background services. Add up the Memory column and watch the CPU column for a minute while your lights run.
Coming soon to Steam
$4.99, once. Leave your email and we'll let you know the day RGB Engine comes out.