"For a few generations now, NVIDIA has been slowly changing how traditional overclocking has been achieved. It used to be a simple process of increasing the video card's clock speed and that was it. With NVIDIA's Turing generation of GPUs, that has changed for the worse. Not only is the BIOS encrypted, but NVIDIA has also gone to great lengths to make sure the Founders Edition and OC (overclocked) editions are the top performers on the market. On top of releasing two variants of the same GPU (A and Non-A), the BIOS restricts the Power Target Limit and makes a difference how far a card can overclock."
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