GPU overclocking means pushing the speed of your graphics card beyond its default settings to get higher frame rates and smoother performance in video games, multimedia rendering, and other graphics-intensive tasks. Every graphics card operates at a certain standard frequency, overclocking enables your card to perform beyond that standard.
A GPU overclock can also give you an edge when cranking up visual details. Without that overclock, I'd have to dial back some visual settings and make sacrifices.
Other GPU-dependent tasks might also benefit from an overclock, including multimedia rendering, which is done mostly by the GPU. Whatever the task, overclocking your GPU can give you a bump in performance by maximizing the potential of your graphics card.
It's like a runner exceeding their typical physical limits to run faster than usual. But just like a runner sprinting for the finish line, your graphics card can't maintain that performance forever. Overclocking beyond what your GPU can handle can cause your computer's temperature to rise and other stability issues, including hardware damage. That's why it's crucial to overclock safely.
First, launch MSI Afterburner.
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Usually you can overclock VRAM between 10-15% to get a drastic performance boost in games that rely heavily on it, especially ones with lots of textures. Note that games react differently to a high memory clock. Some will run significantly faster with no problem, others might show artifacts.
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Excerpt from ©Avast, Sandro Villinger