Strange colored dots, flickering textures, geometric shapes tearing across the screen, or flashing blocks during games are called artifacts, and they are one of the more alarming things a PC can do. They usually point to the graphics card, its drivers, or its operating conditions rather than random bad luck. This guide walks through the likely causes in order, from easy fixes to the ones that suggest failing hardware.
What Artifacts Are Telling You
Artifacts happen when the GPU produces incorrect image data. That can stem from unstable overclocks, overheating memory, a bad driver, a marginal connection, or genuinely degrading hardware. The pattern and timing offer clues: artifacts only under load and heat point to thermal or overclock issues, while artifacts even in the BIOS or desktop point more toward hardware or connection faults.
Software versus hardware
If artifacts appear only in one game, suspect that game or its shaders. If they show up across many games or on the desktop, the problem is more likely the card, drivers, or cabling.
Troubleshooting in Order
| Step | Check | Why |
|---|---|---|
| 1 | Reset any GPU overclock to stock | Unstable clocks cause artifacts |
| 2 | Clean-install the latest GPU driver | Rules out driver corruption |
| 3 | Monitor GPU temperatures under load | Overheating memory artifacts |
| 4 | Reseat the card and power cables | Loose contacts glitch output |
| 5 | Swap the display cable | Bad cables mimic GPU faults |
| 6 | Test the card in another system if possible | Isolates the hardware |
Work top to bottom. Most artifact cases are solved by resetting an overclock, doing a clean driver reinstall, or fixing cooling and cabling before you reach the possibility of a failing card.
Temperature and Power Details
Hot memory is a common culprit
Graphics memory that runs very hot can produce artifacts under load even when the core temperature looks fine. Improve case airflow, clean dust from the card’s fans and heatsink, and make sure intake and exhaust are not blocked.
Power delivery
A weak or failing power supply, or a poorly seated power connector, can cause visual glitches and crashes under load. Ensure all GPU power cables are fully connected and that the PSU has enough wattage headroom for the card.
Isolating Software From Hardware
The most useful diagnostic move is deciding whether the fault is software or hardware, because it saves hours. Artifacts confined to a single game usually point to that game’s shaders, a bad update, or an overclock that is unstable only under that title’s specific load; verifying game files and clearing the shader cache often clears it. Artifacts that appear across many games, on the Windows desktop, or even in the BIOS before Windows loads strongly suggest the hardware or connection, since no game driver is involved at that stage. That single observation narrows the search dramatically.
The clean driver reinstall
Half-installed or corrupted graphics drivers are a surprisingly common cause. A proper clean reinstall, removing the old driver fully before installing the latest, resolves many cases that a simple update over the top does not. Do this before assuming the card is failing, because it is quick and free and rules out a whole category of software faults.
Confirming a hardware fault
If artifacts survive stock clocks, good temperatures, a known-good cable, and a clean driver, and especially if they appear at the desktop or in BIOS, the card itself is the likely culprit. Testing it in another system, or another card in yours, confirms it. At that point, if the card is under warranty, document the behavior and pursue a replacement rather than continuing to chase settings that will not fix failing hardware.
FAQ
Do artifacts always mean my GPU is dying?
No. Many cases come from unstable overclocks, corrupted drivers, overheating, or bad cables, all of which are fixable. Persistent artifacts that survive stock clocks, a clean driver install, good temperatures, and a known-good cable are the ones that suggest failing hardware.
Can a bad cable really cause artifacts?
Yes. A damaged or marginal display cable can produce sparkles, flickering, and glitchy patches that look exactly like a GPU fault. Swapping to a known-good cable is a quick, cheap test that rules this out early.
Bottom Line
Treat artifacts as a diagnostic message, not a death sentence. Reset overclocks, clean-install drivers, check temperatures, and reseat the card and cables before assuming the worst. If glitches persist through all of that and appear even at the desktop or in BIOS, the graphics card itself is the likely cause and should be tested in another system or serviced.
