How to Diagnose and Fix GPU Artifacting

Published 2026-10-16 · LuxuriousComputers Repair

GPU artifacting is when your graphics card produces visual errors on screen: colored lines, flickering pixels, checkerboard patterns, texture corruption, screen-wide color shifts, or geometry that stretches and distorts. These artifacts can appear during gaming, video playback, or even on the Windows desktop. Some artifacting is caused by software or settings and is fixable. Some indicates hardware failure. Here is how to tell the difference and what to do about each.

What GPU artifacts look like

Artifacts take many forms depending on what is failing and when:

• Colored lines or bars: Horizontal or vertical lines across the screen, often in bright colors. These can be static or flicker. They may appear in specific areas or across the entire display
• Texture corruption: In games, textures on objects appear scrambled, stretched, or replaced with random patterns. Walls may show checkerboard patterns or psychedelic colors instead of their normal appearance
• Screen-wide color tint: The entire display shifts to a pink, green, or yellow tint. This can be intermittent or constant
• Pixel snow: Random bright pixels scattered across the screen, like static on an old TV
• Geometry errors: In 3D applications, objects stretch into long spikes or triangles that extend across the screen. This is sometimes called spiking
• Black screen with recovery: The display goes black momentarily and then returns, sometimes with a notification that the display driver stopped responding and has recovered
• Complete freeze with artifacts: The screen freezes with visible corruption and the system stops responding entirely

Software causes of artifacting

Driver issues

Bad GPU drivers are the most common software cause of artifacts. A corrupt driver installation, an unstable new driver version, or a driver that conflicts with a Windows update can all produce visual glitches:

• Update the driver: Download the latest driver from NVIDIA, AMD, or Intel (not through Windows Update). Install it and test
• Roll back the driver: If artifacting started after a driver update, the new driver may be the problem. Open Device Manager, expand Display adapters, right-click your GPU, Properties, Driver tab, Roll Back Driver
• Clean install the driver: For persistent driver issues, use DDU (Display Driver Uninstaller) in Safe Mode to completely remove all traces of the current driver, then install the latest version fresh. DDU removes registry entries, leftover files, and configuration that a normal uninstall leaves behind

Overclocking

If you or someone else has overclocked the GPU (raised the core clock, memory clock, or both beyond factory settings), artifacts are a direct symptom of an unstable overclock:

• Open your overclocking software (MSI Afterburner, EVGA Precision, AMD Adrenalin) and reset all settings to default
• If you do not use overclocking software, check the BIOS for any GPU-related overclocking settings
• Some GPUs come factory-overclocked from the manufacturer. In rare cases, even the factory overclock can be unstable. Use the overclocking software to underclock slightly (reduce the core and memory clock by 50-100 MHz) and see if artifacts stop

Game-specific artifacts

If artifacts only appear in one specific game and everything else is clean, the issue is likely the game, not the GPU:

• Update the game to the latest version
• Verify the game files through the game launcher (Steam: right-click the game, Properties, Installed Files, Verify integrity)
• Lower the game's graphics settings, particularly texture quality, shadow quality, and any ray tracing options. Some artifacts appear when VRAM usage exceeds what the GPU has available
• Check if other players report the same issue. Game-specific rendering bugs are common, especially in newly released or recently updated games

Hardware causes of artifacting

Overheating

GPU overheating is the most common hardware-related cause of artifacts and the most fixable:

• Monitor GPU temperature using HWMonitor, GPU-Z, or MSI Afterburner's on-screen display. Normal operating temperature under load is 65-85°C for most GPUs. Above 90-95°C, artifacts become likely. Above 100°C, thermal throttling and shutdown occur
• If the GPU is overheating, clean the dust from the heatsink and fans. GPU heatsinks collect dust between the fins just like CPU coolers. Hold the fans still and use compressed air to blast dust out
• Check that all GPU fans are spinning under load. A dead fan (common on older cards) causes one section of the heatsink to cool inefficiently
• If cleaning does not help and the card is several years old, the thermal paste between the GPU chip and heatsink may have dried out. Replacing GPU thermal paste requires removing the heatsink from the card, which involves removing several screws and carefully disconnecting the fan cable. Apply new thermal paste to the GPU die (a small amount, similar to a CPU), and also check and replace the thermal pads on the VRAM chips if they appear degraded

VRAM failure

The video memory (VRAM) chips on the GPU can fail or develop errors. VRAM failure produces consistent artifacts that appear even at idle or on the Windows desktop, not just under load:

• Artifacts that appear at the Windows login screen or on the BIOS/POST screen (before Windows loads) are almost certainly hardware. Drivers are not loaded at that point, so software is not a factor
• VRAM errors often produce a consistent pattern: the same type of artifact in the same areas of the screen, or artifacts that correlate with specific pixel positions
• There is no widely available consumer tool to test VRAM comprehensively. Some GPU stress tests (OCCT, FurMark) can trigger artifacts quickly if VRAM is failing, but they test more than just memory

GPU chip degradation

The GPU chip itself can degrade over time, especially if it has been subjected to sustained high temperatures, heavy overclocking, or poor power delivery:

• Artifacts that worsen over time (getting more frequent or more severe week by week) suggest progressive hardware degradation
• Artifacts that appear at stock settings, with good temperatures, and a clean driver install point to chip-level failure
• A GPU that was stable for years and suddenly starts artifacting without any software changes is likely experiencing hardware failure

Power delivery issues

An underpowered or failing power supply can cause GPU artifacts because the GPU does not receive stable power under load:

• If artifacts only appear during heavy GPU load (gaming, rendering), check that the PSU has adequate wattage for the system
• Make sure all required GPU power connectors are plugged in. Some GPUs need both a 6-pin and an 8-pin connector, or dual 8-pin connectors. A missing connector causes the GPU to draw insufficient power
• Try a different PCIe power cable from the PSU if your PSU is modular. A damaged or loose cable can cause intermittent power delivery problems
• Check that the GPU is fully seated in the PCIe slot. A partially inserted card can cause intermittent artifacts and crashes

Ruling out the monitor and cable

Before concluding the GPU is at fault, rule out the display chain:

• Try a different cable: A damaged DisplayPort or HDMI cable can produce artifacts that look identical to GPU problems. Swap the cable and test
• Try a different monitor: If artifacts appear on a different monitor with the same GPU and cable, the GPU is the source. If they disappear, the original monitor may be failing
• Try a different port: Use a different video output on the GPU (switch from one DisplayPort to another, or from DisplayPort to HDMI). A damaged port on the GPU can cause artifacts on that port only

GPU diagnosis and repair in Marion

If your graphics card is showing artifacts and you have ruled out drivers, overheating, and cables, the GPU hardware is likely failing. Luxurious Computers in Marion provides GPU diagnosis, thermal maintenance, and can advise on replacement options for both desktops and laptops.