What Causes Graphics Card Artifacting and How to Fix It

Published 2026-10-16 · LuxuriousComputers Repair

Your screen shows colored pixels where they should not be. Textures stretch into triangles across the screen. Random blocks of color flash and disappear. Lines and patterns appear that have nothing to do with what you are looking at. These visual anomalies are called artifacts, and they indicate that your graphics card (GPU) is producing incorrect visual data. Artifacting ranges from a minor cosmetic annoyance to a sign that the GPU is failing. Understanding what causes artifacts and what the different types mean helps you determine whether the problem is fixable or whether the card needs replacement.

Types of artifacts and what they indicate

Texture corruption

• Textures in games or 3D applications appear smeared, stretched, or replaced with incorrect patterns. A wall that should show bricks instead shows a warped mess of colors or a completely wrong texture
• This typically indicates a problem with the GPU VRAM (video memory). The data stored in memory is corrupted or being read incorrectly. It can be caused by overheating, failing VRAM chips, or an unstable memory overclock

Screen-wide colored blocks or pixels

• Random colored squares, lines, or scattered pixels appear across the entire screen, including the desktop, not just in games or 3D applications
• Artifacts visible on the desktop and in BIOS (before the operating system loads) point to a hardware problem with the GPU or display output. If artifacts only appear in specific applications, the cause may be software-related

Geometric distortion

• 3D geometry stretches, spikes, or distorts into impossible shapes. Triangles extend to the edges of the screen. Objects flicker between correct and incorrect positions
• This indicates problems with the GPU shader processors or geometry pipeline. It can be caused by overheating, failing GPU silicon, or driver issues

Screen flickering and flashing

• The entire screen flashes, goes black momentarily, or rapidly alternates between normal and corrupted display
• This can indicate a failing GPU, a bad display cable connection, a dying monitor, or driver problems. The overlap in symptoms makes diagnosis trickier — you need to isolate which component is responsible

Software causes and fixes

Driver issues

• Corrupted, outdated, or buggy graphics drivers are one of the most common causes of artifacting, and also the easiest to fix
• Update to the latest driver from the GPU manufacturer (NVIDIA or AMD). If the latest driver introduced the artifacts, roll back to the previous version that worked correctly
• For a thorough driver fix, uninstall the current driver completely using Display Driver Uninstaller (DDU) — a free tool that removes all traces of the graphics driver. Then install a fresh copy of the latest stable driver. This eliminates corrupted driver files or conflicting remnants from previous installations

Overclocking

• If you have overclocked your GPU (increased the clock speeds beyond factory settings), the overclock may be unstable. GPU overclocks that appear stable in benchmarks can produce artifacts in specific games or applications that stress the card differently
• Reset the GPU to stock clock speeds using your overclocking software (MSI Afterburner, EVGA Precision, or similar). If the artifacts disappear at stock speeds, the overclock was the cause. Reduce the overclock to a more conservative level
• Also check the memory clock separately from the core clock. VRAM overclocks are often the first to show artifacts — they appear as texture corruption rather than geometric distortion

Application-specific artifacts

• If artifacts only appear in one specific game or application and everything else works fine, the problem is likely that application rather than the GPU
• Check for game updates or patches. Verify game files through the game platform (Steam Verify Integrity of Game Files, Epic Games Verify, etc.). Try lowering graphics settings — particularly VRAM-intensive settings like texture quality and resolution
• Some games have known issues with specific GPU architectures or driver versions. Check the game forums and known issues list for your GPU and driver combination

Hardware causes and diagnosis

Overheating

• GPUs throttle performance when they overheat, but before throttling kicks in, the card may produce artifacts as the silicon operates outside its reliable temperature range
• Monitor GPU temperature using a tool like HWiNFO, GPU-Z, or MSI Afterburner. Normal gaming temperatures are typically 65 to 85 degrees Celsius depending on the card. Temperatures consistently above 90 degrees indicate a cooling problem
• Common overheating causes: Dust accumulation blocking the heatsink fins or fan intake. Fan failure (one or more fans not spinning or spinning slowly). Dried or insufficient thermal paste between the GPU chip and heatsink. Poor case airflow restricting fresh air to the GPU
• Fixes: Clean dust from the GPU heatsink and fans with compressed air (power off and unplug first). Verify all fans spin when the GPU is under load. If the card is several years old, replacing the thermal paste can significantly reduce temperatures. Improve case airflow by adding fans or reorganizing cable management

Failing VRAM

• VRAM chips on the graphics card can develop faults over time, particularly from thermal stress (repeated heating and cooling cycles). Failed VRAM produces texture corruption, colored pixel blocks, and consistent artifacts in the same screen regions
• VRAM failure is a hardware defect that cannot be fixed by software. If VRAM testing (using tools like OCCT VRAM test or MemtestG80) reveals errors, the card needs repair or replacement
• Partially failed VRAM may produce artifacts only at higher resolutions or texture quality settings because those settings use more of the VRAM capacity, including the faulty regions. Reducing texture quality may hide the symptoms but does not fix the underlying problem

GPU chip degradation

• The GPU processor itself can degrade over time, especially on cards that have been overclocked, overheated, or heavily used for years. Mining cards that ran at high temperature 24/7 are particularly susceptible
• Symptoms of GPU chip degradation include progressive worsening of artifacts over time, artifacts appearing at lower and lower workloads, and eventual failure to display anything
• GPU chip failure is not repairable in a cost-effective way for consumer cards. Replacement is the practical solution

Power delivery issues

• If the GPU is not receiving stable, adequate power, it can produce artifacts under load. This happens when the PSU is underpowered, the PCIe power cables are loose or damaged, or the PSU is failing
• Check that all GPU power connectors are fully seated. Try different PCIe power cables from the PSU if available. If the PSU is near its capacity limit with the current GPU, upgrading the PSU may resolve artifacts that only appear under heavy load

Isolating the cause

• Test with a different cable and monitor: A bad display cable or failing monitor can produce symptoms similar to GPU artifacts. Swap the cable first (it is the cheapest component). If artifacts persist on a different monitor with a different cable, the GPU is the source
• Test in a different system: If possible, install the GPU in a different computer. If artifacts follow the GPU to another system, the card itself is the problem. If the artifacts stop in another system, the original system PSU, motherboard PCIe slot, or software configuration may be responsible
• Test with integrated graphics: If your CPU has integrated graphics, remove the GPU and connect the monitor to the motherboard display output. If the artifacts disappear, the GPU is confirmed as the source
• Check in BIOS: If artifacts are visible in the BIOS screen before the operating system loads, the problem is hardware — not drivers, not Windows, not applications. The GPU is producing incorrect output at the most basic level

When to replace vs repair

• Software fixes (driver reinstall, removing overclock) are free and should always be tried first
• Thermal fixes (cleaning, repasting) are inexpensive and often effective for cards that artifact only when hot
• VRAM or GPU chip failure cannot be practically repaired on consumer cards. The cost of reballing or chip replacement exceeds the value of most cards. Replacement is the standard solution
• If the card is under warranty and showing hardware artifacts, contact the manufacturer for an RMA. Document the artifacts with photos or video before contacting support

Need help diagnosing GPU issues?

If your computer is showing visual artifacts and you are not sure whether the problem is the GPU, the display, the cable, or a software issue, LuxuriousComputers Repair can diagnose the source of the problem, test your graphics card, and recommend whether a driver fix, thermal service, or card replacement is the right solution.