The "frame lag" you're talking about is just Hz or FPS rewritten in milliseconds per frame. But that's an important number to bring up, since it is definitely noticeable when something doesn't change for 16 ms versus 4 ms. 120 Hz is ~8 ms and 240 Hz is about ~4 ms.
240hz is a sham. The human eye can't tell the difference between 120 and 240. We can barely differentiate anything above 60.
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Agreed, 144hz is noticeably different from 60hz. I got some refurbished ones and going back to 60hz is painful. Everything just feels so laggy.
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The "frame lag" you're talking about is just Hz or FPS rewritten in milliseconds per frame. But that's an important number to bring up, since it is definitely noticeable when something doesn't change for 16 ms versus 4 ms. 120 Hz is ~8 ms and 240 Hz is about ~4 ms.
Man, I can tell the difference between 140 and 120. There's a massive difference between 120 and 240.