Is your RGB software causing stutter in games?

Why it happens

To animate your lights, an RGB app sends updates to your motherboard, RAM, graphics card and peripherals many times a second. Each update is small, but they arrive as short, irregular bursts of CPU work.

A burst that lands while the game is preparing a frame delays that frame. One late frame doesn't move your average FPS, but it drags down the 1% and 0.2% lows, and that's the hitch you feel. It gets worse with several RGB apps running at once, one per brand, each with its own background service.

What the tests show

How-To Geek measured SignalRGB on and off with CapFrameX on a Ryzen 7 7700 PC. In Marvel Rivals the 1% and 0.2% lows were clearly better with SignalRGB off. Starfield's lows and frame-time evenness were worse with it on. Red Dead Redemption 2 showed no real difference.

On the ASUS ROG forum, an RTX 4090 owner traced stutter in almost every game to Armoury Crate's LightingService.exe. It was worst in CPU-heavy games like Assassin's Creed Odyssey and went away when the graphics card's lighting was set to a static color instead of a moving effect.

How to check your own PC

1. Install a frame-time tool like CapFrameX and pick a repeatable part of a game, like a built-in benchmark.
2. Record it with your RGB apps running as normal.
3. Fully quit every RGB app, including its tray icon and background service, and record again.
4. Compare the 1% and 0.2% lows, not the average. Run each a couple of times, since results vary.

The fix: switch to RGB Engine

Most people fix RGB stutter by turning their lights off. RGB Engine lets you keep them.

It replaces the pile of vendor apps with one small engine for every brand, so there's one background process instead of several, each waking your CPU. It uses well under 1% of the CPU and updates your lights on a steady, even timer.

Close the window and only the lights keep running. Want even less? Power saver mode halves the update rate, and Lights off is one click in the tray.

RGB Engine

Under 15 MB, 2 processes

SignalRGB

~1.5 GB, 13 processes

Task Manager's Memory column on the same 16-thread gaming PC: RGB Engine itself uses 1 to 4 MB, and OpenRGB, which talks to your hardware, 4 to 11 MB. Windows trims both when they sit idle, so you'll often see less. What RGB Engine uses

Other fixes

Set your lights to a static color and close the app before you play. It works, but you lose the effects you bought RGB for.

Turn off animated effects on the graphics card, which the ROG forum report pointed to as the trigger.

Run fewer apps. Every vendor app you remove is one less background service waking up your CPU.

Sources

1. Microstutter in games? Your RGB software might be at fault, How-To Geek, November 1, 2025.
2. LightingService.exe Causing Stuttering!, ASUS ROG forum, May 2023.