When Mandelbulber2 processes complex fractals or heavy scenes, the GPU may take longer than usual to respond. This can cause Windows to assume the driver has hung, triggering a TDR (Timeout Detection and Recovery) crash.
To provide the system with more tolerance for these intensive OpenCL tasks, I recommend increasing the TdrDelay in the Windows Registry:
Navigate to: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\GraphicsDrivers
Create a new DWORD (32-bit) value named TdrDelay.
Set the value to [10] (Decimal).
Restart your system.
This extends the timeout window to 10 seconds, allowing the GPU to complete heavy kernels without the OS forcefully resetting the driver.