How to Fix GPU Artifacts and Visual Glitches on Your Screen

Published 2026-10-16 · LuxuriousComputers Repair

Your screen shows random colored lines, flickering squares, corrupted textures, or visual distortion. These artifacts may appear during gaming, when watching video, or even on the Windows desktop. Some artifacts are subtle — slight texture shimmer or occasional pixel flicker — while others are dramatic — large blocks of color, screen-wide corruption, or a complete display freeze followed by a driver crash. GPU artifacts indicate a problem with either the graphics hardware, the driver software, or the conditions the GPU is operating under.

What GPU artifacts look like

• Texture corruption: surfaces in games or 3D applications display incorrect colors, garbled patterns, or stretched pixels where there should be a coherent image
• Screen tearing and flickering: horizontal lines across the screen where the upper and lower portions show different frames, or rapid flashing of elements
• Colored dots or lines: random bright pixels, colored lines, or small rectangles scattered across the screen that are not part of the actual content being displayed
• Driver crashes: the screen goes black momentarily, then recovers with a notification that the display driver stopped responding and has recovered. This is Windows detecting that the GPU became unresponsive and resetting it
• Complete visual corruption: the entire display becomes garbled, showing random colors and patterns with no recognizable content. This typically requires a restart to resolve

Determine if the GPU or display is the cause

• Connect a different monitor or display to the computer. If the artifacts appear on the new display as well, the GPU is the source. If the new display is clean, the original monitor or the cable connecting it may be faulty
• Try a different display cable (HDMI, DisplayPort, DVI). A damaged cable can produce artifacts that look similar to GPU problems — flickering, sparkles, or intermittent signal loss. Display cables are cheap and eliminating them as a variable takes seconds
• If the artifacts only appear in specific applications (only in one game, only in a particular video player), a software issue is more likely than a hardware failure. GPU hardware failures typically produce artifacts everywhere, not just in one application

Software fixes

Update the GPU driver

• An outdated or buggy GPU driver is the most common software cause of visual artifacts. GPU drivers are updated frequently and each update fixes bugs that can cause rendering errors in specific applications or scenarios
• For NVIDIA GPUs, download the latest driver from the NVIDIA website or use GeForce Experience. For AMD GPUs, use the AMD Software Adrenalin Edition or download from the AMD support page. For Intel integrated graphics, check the laptop or motherboard manufacturer website
• When updating, choose a Clean Installation option if available. This removes all previous driver settings and installs the new driver fresh, eliminating potential conflicts from old configuration data
• If artifacts started after a driver update, the new driver may have introduced a bug. Roll back to the previous version using Device Manager (right-click the display adapter, Properties, Driver tab, Roll Back Driver) or download an older driver version from the manufacturer website

Perform a clean driver installation

• If updating alone does not fix the artifacts, do a thorough clean installation using Display Driver Uninstaller (DDU). DDU removes all traces of the current GPU driver, including registry entries and leftover files that a standard uninstall misses
• Boot into Safe Mode, run DDU to remove the GPU driver completely, then restart in normal mode and install the latest driver. This process eliminates driver corruption that persists through normal update procedures

Check for application-specific issues

• If artifacts only occur in one game or application, the problem may be with that specific software. Check for game patches or updates. Verify the game files through the game launcher (Steam, Epic, etc.) to repair any corrupted game files
• Lower the graphics settings in the game. Artifacts can appear when a specific rendering feature (tessellation, ray tracing, specific anti-aliasing modes) is not working correctly with your GPU. Reducing settings can identify which feature triggers the artifacts
• Disable any GPU overclocking or performance profiles in the GPU control panel. Even factory overclocked GPUs can produce artifacts if the overclock is beyond what that particular chip can handle reliably

Overheating

• GPUs generate significant heat during operation. When a GPU overheats, it produces artifacts as the silicon begins operating outside its designed temperature range. Overheating artifacts typically appear under load (gaming, video editing, rendering) and disappear when the GPU cools down
• Monitor the GPU temperature using the manufacturer software or a tool like HWMonitor. Most GPUs are designed to operate safely up to 80-90 degrees Celsius. Temperatures above 90 degrees during sustained load may cause artifacts and thermal throttling
• Clean dust from the GPU heatsink and fans. Over time, dust accumulates on the heatsink fins and fan blades, reducing cooling efficiency. Use compressed air to blow dust out of the GPU cooler. For desktop GPUs, this may require opening the computer case
• Verify all GPU fans are spinning during load. A dead fan on the GPU cooler dramatically reduces cooling capacity. If a fan has failed, the GPU needs the fan replaced or the entire cooler serviced
• In laptops, GPU overheating can be caused by blocked vents, degraded thermal paste, or using the laptop on soft surfaces that block airflow. Ensure vents are clear and the laptop is on a hard flat surface

Overclocking issues

• If the GPU is overclocked (either a factory overclock or a user-applied overclock), the overclock may be pushing the chip beyond its stable operating range. Artifacts during gaming or benchmarking after overclocking are a clear sign the overclock is too aggressive
• Reset the GPU to its default clock speeds using the manufacturer software (MSI Afterburner, EVGA Precision, etc.) or the GPU control panel. If artifacts stop at default clocks, the overclock was unstable
• Even factory overclocked GPUs can sometimes produce artifacts, especially as they age. If a factory OC card shows artifacts, try underclocking it slightly (reducing the core clock by 50-100 MHz) to see if stability improves
• VRAM (video memory) overclocking is particularly prone to causing visual artifacts. Memory errors produce texture corruption, colored pixels, and garbled rendering. Reset VRAM clocks to default as a first step when troubleshooting

Insufficient power

• Desktop GPUs require adequate power from the power supply unit (PSU). If the PSU does not deliver enough power, the GPU may artifacts or crash under load when power draw peaks
• Check that all required power connectors are plugged into the GPU. High-end GPUs need one or two 8-pin or 6-pin PCIe power connectors. A missing connector means the GPU runs underpowered
• If the PSU is old or undersized for the GPU, it may not deliver stable voltage under load. Voltage drops cause GPU instability that manifests as artifacts and crashes. Upgrading to a higher-wattage PSU or replacing an aging one can resolve the issue

Hardware failure

• If artifacts persist at stock clocks, with updated drivers, at normal temperatures, and across all applications and displays, the GPU hardware may be failing. GPU failures can be caused by aging, manufacturing defects, or physical damage
• VRAM failure is a common hardware cause of persistent artifacts. Bad VRAM cells produce consistent visual corruption that does not change with driver updates or temperature. VRAM failure is not repairable and requires GPU replacement
• Test with a different GPU if possible. If a different GPU works without artifacts in the same system, the original GPU has a hardware problem. If artifacts persist with a different GPU, the problem may be the PCIe slot, the motherboard, or the power supply

Need help with GPU artifacts?

If your screen shows visual artifacts and the software fixes above have not resolved the issue, LuxuriousComputers Repair can diagnose whether the problem is the GPU, drivers, cooling, or power, test your graphics hardware, and recommend the right repair or replacement to get your display working cleanly again.