Symptoms of a failing GPU include screen artifacts (such as flickering, lines, or strange colours), crashes during graphic-intensive tasks, low frame rates, overheating, and failure to boot.

You can test your GPU using diagnostic tools like GPU-Z, MSI Afterburner, or benchmarking software. These tools measure GPU performance, temperature, and stability. Professional testing may be required for a thorough diagnosis.

Frequent crashes during gaming or graphic-intensive tasks can indicate a GPU failure or overheating. Updating drivers, lowering graphic settings, and checking for dust buildup can help temporarily, but further repair or replacement may be needed.

To prevent GPU overheating, ensure proper ventilation, clean dust from fans and vents, and check that the thermal paste on the GPU is in good condition. Overclocking can also cause overheating, so restoring factory settings might help.

First, check your cables and monitor. If they are functioning, reseat the GPU, update drivers, and ensure the power supply is sufficient for the GPU. If the issue persists, the card may need repair or replacement.

Yes, outdated or corrupted drivers can cause issues like screen flickering, crashes, or poor performance. Always ensure your GPU drivers are up-to-date and compatible with the latest operating system updates.