How to Fix GPU Artifacting and Visual Glitches
GPU artifacts are visual errors caused by the graphics card producing incorrect output. They appear as random colored pixels scattered across the screen, missing or corrupted textures in games, horizontal or vertical lines that were not there before, flickering polygons, screen tearing that persists regardless of V-Sync settings, or entire sections of the display rendering as solid blocks of color. Artifacts can appear only in games, only on the desktop, or both — and the pattern tells you a lot about the cause.
Types of GPU artifacts and what they indicate
In-game artifacts only
Artifacts that appear exclusively during 3D rendering (games, 3D modeling, GPU benchmarks) but never on the desktop or during normal use typically indicate a problem that surfaces only under load. The GPU is working harder — drawing more power, generating more heat, and accessing VRAM more aggressively. Common causes include overheating under load, an unstable overclock, insufficient power delivery, or VRAM that is starting to fail but only shows errors at high utilization.
Desktop artifacts
Artifacts visible on the desktop — corrupted icons, garbled text rendering, colored blocks on the taskbar, or flickering that happens even at idle — indicate a more fundamental problem. The GPU is producing errors even at minimal load, which usually means a driver-level issue, a failing GPU core, or a display cable or connection problem. Desktop artifacts that appeared suddenly after a driver update are almost certainly software-related. Desktop artifacts that appeared gradually and worsen over time point to hardware failure.
Specific patterns
- Random colored pixels (sparkles or confetti): Usually VRAM errors. The GPU writes data to VRAM and reads back corrupted values, producing pixels in wrong colors at random positions
- Missing or black textures: Texture data in VRAM is not being read correctly, or the GPU is failing to decompress textures properly. Can be VRAM, can be a driver bug with that specific game
- Stretched or distorted polygons: Vertex processing errors — the GPU is calculating incorrect positions for geometry. This is typically a GPU core issue rather than VRAM
- Screen-wide color tint or banding: Often a cable or connector issue rather than the GPU itself. A loose DisplayPort or HDMI connection, a damaged cable, or a failing port can produce color errors that look like GPU artifacts
- Flickering or flashing: Can be the GPU, the cable, the monitor, or the driver. Process of elimination is required
Software fixes to try first
Clean driver reinstall
A corrupted or misconfigured driver is the single most common cause of GPU artifacts that are not hardware-related. A standard driver update installs over the existing driver files, which can leave behind conflicting settings or corrupt files. A clean install removes everything and starts fresh:
- Download the latest driver from NVIDIA or AMD's website (not through GeForce Experience or Radeon Software — download the standalone installer)
- Download DDU (Display Driver Uninstaller) — a free tool that completely removes all GPU driver traces
- Boot into Safe Mode (Settings, Update and Security, Recovery, Advanced startup, Restart now, Troubleshoot, Advanced options, Startup Settings, restart, press 4 for Safe Mode)
- Run DDU and select Clean and restart
- After restart, install the fresh driver you downloaded
If the artifacts appeared immediately after a driver update, try installing the previous driver version instead of the latest. Driver regressions are common — a new driver can introduce bugs with specific GPU models or games.
Revert any overclocks
If you have overclocked the GPU core clock, memory clock, or adjusted the power limit using MSI Afterburner, EVGA Precision, or similar software, reset everything to default. An unstable overclock is one of the most common causes of in-game artifacts. Even an overclock that was stable for months can become unstable as the GPU ages or as ambient temperatures change with the seasons.
Also check for factory overclocks — some third-party GPU models ship with higher clocks than the reference specification. If you suspect the factory overclock is the issue, you can actually underclock the GPU slightly using Afterburner (reduce core and memory clocks by 50 to 100 MHz) to test whether the artifacts stop.
Check for game-specific issues
If artifacts only appear in one game, the game itself may be the problem. Check the game's forums and known issues list for reports of visual glitches with your GPU model. Try lowering graphics settings — specifically texture quality (reduces VRAM usage), shader quality (reduces GPU computation), and resolution (reduces overall load). If the artifacts disappear at lower settings, the GPU may be at its performance limit rather than failing.
Hardware checks
Temperature monitoring
Install HWMonitor, HWiNFO, or GPU-Z and monitor temperatures during the activity that causes artifacts. Most GPUs throttle at 85 to 95 degrees Celsius and shut down at 100 to 110 degrees. Artifacts that appear after the GPU has been under load for several minutes and correlate with rising temperatures indicate a cooling problem:
- Clean the GPU fans and heatsink. Dust buildup on the heatsink fins blocks airflow and reduces cooling efficiency. Use compressed air to blow dust out of the heatsink from multiple angles
- Check fan operation. With the side panel off, watch the GPU fans during load. All fans should be spinning (some GPUs stop fans at idle — they should start at load). A fan that stutters, stops, or makes grinding noises needs replacement
- Thermal paste. On GPUs older than 3 to 4 years, the thermal paste between the GPU die and the heatsink may have dried out and lost effectiveness. Replacing thermal paste requires removing the GPU cooler (voids warranty on newer cards) but can reduce temperatures by 10 to 20 degrees on old cards
- Case airflow. A GPU in a case with poor airflow recirculates hot air. Ensure the case has intake fans at the front and exhaust at the top or rear. Remove side panel temporarily to test — if artifacts stop with the panel off, airflow is the issue
Cable and connection check
Before assuming the GPU is failing, rule out the simplest possibilities:
- Try a different display cable. DisplayPort cables especially can produce artifacts when partially damaged — they may work at lower resolutions or refresh rates but fail at higher ones
- Try a different port on the GPU. If one DisplayPort or HDMI port is damaged, another may work fine
- Reseat the GPU in its PCIe slot. Power off, unplug, remove the GPU, clean the PCIe contacts with a dry cloth, and reinstall it firmly. A partially seated GPU causes intermittent artifacts
- Check power cables. Make sure the 6-pin or 8-pin PCIe power connectors are fully seated. Use separate cables from the power supply rather than daisy-chaining if the PSU provides them
VRAM testing
VRAM errors produce some of the most recognizable artifacts — random colored dots, corrupted textures, and visual noise that worsens as VRAM usage increases. To test VRAM specifically:
- OCCT (VRAM test): Free tool with a dedicated VRAM test that writes patterns to video memory and checks for errors. Run for at least 30 minutes. Any errors indicate failing VRAM — there is no software fix for bad VRAM
- FurMark or Unigine Heaven: Stress tests that push GPU load to maximum. Watch for artifacts during the test. If artifacts appear only at maximum load and maximum temperature, the GPU is at its thermal or power limit
Power supply issues
A power supply that cannot deliver clean, stable power to the GPU causes artifacts under load. This is especially common with budget or aging power supplies paired with high-end GPUs. Symptoms include artifacts that appear during intense scenes (when power draw spikes), system crashes during GPU-heavy tasks, and coil whine from the GPU or PSU that correlates with visual issues. If the power supply is close to its rated capacity (a 500W PSU running a system that draws 450W under load), it may not handle transient power spikes from the GPU. PSU testers can check voltage stability, but the most definitive test is temporarily using a different, higher-wattage power supply.
When the GPU is failing
Hardware failure is the diagnosis when software fixes, thermal improvements, cable swaps, and power supply checks do not resolve the artifacts. Signs that point to hardware failure rather than software:
- Artifacts are present in the BIOS screen (before any driver loads)
- Artifacts worsen over time — what started as occasional glitches in one game now appears on the desktop
- VRAM tests report errors
- Underclocking the GPU reduces but does not eliminate artifacts
- The GPU has been running hot for an extended period (months or years of gaming at high temperatures)
A failing GPU cannot be repaired through software. The options are replacing the GPU or, for high-end cards, professional rework of the solder joints (a temporary fix that may last weeks to months). Check warranty status — many GPUs carry 3-year warranties from the manufacturer.
GPU diagnosis at LuxuriousComputers
LuxuriousComputers Repair diagnoses GPU artifacts — distinguishing driver issues, thermal problems, VRAM failure, and dying GPU cores using stress testing and diagnostic tools to identify the exact cause and recommend the right fix.