eli5 What does Bottlenecking means?

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My Graphics card is faster than my CPU like way too fast. I don’t know what that means.

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That means your GPU is being slowed down by your CPU’s performance. A bottleneck is where the bottle narrows down to a small opening. Your GPU is the wide area of the bottle and your CPU is the neck of the bottle. Things bunch up there and it slows down to the fastest rate at which the CPU can handle data. If your GPU can play a certain game at 120 fps, it’s being slowed down because the CPU can only do 70 fps.

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