It sounds like your AMD Radeon HD 8790M might be overheating and causing your laptop to crash. This could be due to a variety of reasons, such as dust accumulation, inadequate cooling, or a malfunctioning GPU. Here are a few steps you can try to troubleshoot and potentially resolve the issue:
1. **Clean the laptop**: Make sure the laptop's vents and fans are free of dust and debris. Over time, dust buildup can obstruct airflow and cause overheating issues.
2. **Update drivers**: Sometimes, outdated or corrupted graphics drivers can cause instability. Try updating to the latest drivers from AMD's website and see if that helps.
3. **Check power settings**: Make sure your laptop's power settings are configured properly. High-performance settings can cause the GPU to work harder, leading to increased heat. You may want to switch to a balanced or power-saving mode when not performing demanding tasks.
4. **Monitor temperature**: Use software like HWMonitor or MSI Afterburner to monitor your GPU temperature in real-time. If it's consistently reaching unsafe levels, you may need to take further action.
5. **Reapply thermal paste**: If you're comfortable doing so, consider reapplying thermal paste to the GPU. Over time, the thermal paste can degrade, leading to poor heat transfer between the GPU and the heatsink.
6. **Check for hardware issues**: If none of the above solutions work, there may be a hardware issue with the GPU itself. In this case, you may need to contact Dell support or take your laptop to a professional for repair.
Remember to always be careful when working with computer hardware, especially when it involves opening up your laptop. If you're unsure about any steps, it's best to seek assistance from someone with experience.