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Someone please explain this to me. If ps4 has IO speeds of up to 100 mb p/s, and ps5 has up to 9 gb p/s, does this mean, on ps4, that for every second of screen time, that only 100 mb of data is rendered on screen, or is this a cumulative effect, where every second, 100 mb of extra data is read and added ontop to make more game detail. Like wise with ps5, 9 gb of data maximum per second or cumulative?