Razer Synapse and Signal RGB conflicts

Have you run into issues where your Razer Synapse keeps crashing even after reinstallation and you have no idea why? The issue usually stems from leftover corrupted registry keys, conflicting background software (such as Signal RGB), or deep-level driver deadlocks. To fix this, you will need to try a few things.

If you suspect it's registry issue, perform a complete registry clean, remove hidden residual app folders.

Step 1: Perform a Deep Clean Uninstall

Standard uninstalls leave behind configuration folders and registry entries that cause previous errors to repeat.

1. Close Synapse and end all related Razer tasks in the Windows Task Manager. 

2. Go to Settings > Apps > Installed apps and uninstall Razer Synapse, Razer Core, and Razer Central. 

3. Open File Explorer and navigate to these hidden directories to delete any remaining Razer folders:

   • c:\Program Files\Razer

   • c:\Program Files (x86)\Razer

   • c:\Program Files (x86)\Razer Central

   • c:\Program Files\Razer  (Note: You may need to enable "Hidden items" in the View tab to see Program Data)

4. Press Windows Key + R, type %localappdata%, and delete the Razer folder.

Step 2: Remove Old Drivers

Razer peripherals leave behind cached driver profiles which can crash the application upon startup.

1. Press Windows Key + X and select Device Manager. 

2. Expand categories like Keyboards, Mice and other pointing devices, and Human Interface Devices. 

3. Right-click on any Razer devices and select Uninstall device. 

4. Check the box that says "Attempt to remove the driver for this device" and click Uninstall. [13]

Step 3: Run as Administrator & Disable Optimizations

Synapse often fails to communicate with your OS if it lacks permissions or conflicts with Windows features.

1. Reinstall Razer Synapse from the Razer Downloads page.

2. Locate the Synapse executable file on your desktop or in your installation folder.

3. Right-click the app, select Properties, and navigate to the Compatibility tab.

4. Check the boxes for Run this program as an administrator and Disable fullscreen optimizations. 

5. Click Apply, then OK, and launch the program.

Step 4: Check for Conflicting Software

Third-party RGB or system-tuning software (like SignalRGB) is known to cause kernel deadlocks and crashes when run alongside Razer Synapse.

1. If you use SignalRGB, OpenRGB, or ASUS Armoury Crate, force quit them.

2. Launch Synapse by itself to see if the crashing stops.

If you tell me which version of Synapse you are using (Synapse 3 or Synapse 4) and if you have any other RGB software installed, I can provide more specific troubleshooting steps for your configuration.

Generally Razer Synapse and SignalRGB conflict out of the box. Because both programs try to assert exclusive control over the same USB hardware and driver layers, running them simultaneously usually results in your Razer gear rapidly flickering, displaying the wrong colors, or freezing entirely.  

By default, SignalRGB recognizes this conflict and will attempt to force-close Synapse when it boots.

However, if you need Synapse running to handle your keybinds, mouse macros, or DPI profiles, you can force them to coexist by stripping lighting control away from Synapse and letting SignalRGB rule the LEDs.  

1. Neutralize Lighting in Synapse

You have to stop Synapse from actively pushing color data to your gear.  

• Open Razer Synapse.

• Go to the Lighting tab for each connected Razer device.  

• Set the effect to "Off" or set the profile color to static black.  

• Note for Synapse 4 / Beta users: Even if you opted out of installing the Chroma module, the base Synapse app still sends baseline RGB calls. If you experience flickering, drop the device brightness slider to 0% inside Synapse.  

2. Adjust SignalRGB to Allow Synapse

Next, stop SignalRGB from aggressively killing the Synapse process:

• Open SignalRGB and go to Settings → Windows Settings.

• Turn off "Automatically Close Conflicting Programs" so Synapse is allowed to live in your system tray.

• Go to the Devices tab in SignalRGB, select your Razer device, and open its settings.  

• Look for the conflict warning and select Bypass or Ignore. Toggling the device Disabled and then Enabled right after usually forces SignalRGB to permanently seize priority over the lighting stream.

  
  

The Nuclear Option (If Flickering Persists)

Sometimes Synapse still sends an intermittent "heartbeat" command to the hardware, causing an annoying micro-flicker every few seconds.  

If this happens, the cleanest fix is to configure all your custom keybinds and profiles inside Synapse, save them directly to your hardware's on-board memory profiles, and then disable Razer Synapse from launching on Windows startup entirely. Your macros will still work natively from the hardware's memory, and SignalRGB will have completely unhindered control over the lights.