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Green Triangles and Distorted Graphics in Games

Green triangles and other similar graphical anomalies in 3D video games and applications are known as "artefacts." These are a result of the graphics card making errors in rendering the 3D scene. Errors are almost always caused by overheating hardware. If you've overclocked your graphics card, this is almost certainly the reason why you've been seeing these artefacts. It's normal for them to appear several minutes, or even considerably longer, into a gaming session once the graphics card has had time to heat up so much that it is no longer working correctly. If you do not close down the game and take the load of the graphics card, it will normally overheat to the point at which your computer crashes, sometimes even causing damage to your hardware. If you see any hint of artefacts from appearing, close down the game immediately and follow these steps.

1 - Put the Graphics Card Clock Speeds Back to Default Settings
If you've overclocked your graphics card, this is undoubtedly the reason why you've suddenly encountered this problem. Using whichever software you used to overclock the graphics card, put the settings back to their default values. It's also a good idea to then turn the computer off for a while so that the hardware has a chance to cool down again. If you're comfortable with taking the risk, you may want to try a more modest overclock until you find an optimal clock speed at which there are no artefacts appearing.

2 - Faulty Graphics Card or Inadequate Cooling
If you've never overclocked your graphics card and artefacts are still appearing, it is still most likely because the hardware is overheating. In such cases, you're normally best off taking the graphics card or computer back to where you brought it from for a replacement, since there are still problems with the card running at default settings with stock cooling.

Alternatively, you may want to check your computer's cooling. Ensure that the fans on the graphics card are spinning when the computer is turned on. They should always be running, even when you're not actually playing a video game (though it's normal for them to run at a higher RPM when the card is on full load). If they're not, they could either be too clogged up with dust or damaged somehow. You should also ensure that your computer is running under normal operating temperatures and away from any heat sources such as radiators or sunlight.


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