Intermittent GPU Hardware Faults Triggering Random Screen Artifacts

My Windows 11 PC is experiencing intermittent and unpredictable screen artifacts, such as flickering, distorted pixels, or strange visual glitches, which strongly suggests an underlying hardware fault with my GPU. These issues occur randomly during both gaming and basic desktop usage, and I am seeking advice on how to properly diagnose whether this is a driver problem, a failing graphics card, or a power supply issue.