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?
Think of Ram as a water tank... And the CPU and GPU as the taps, by constantly running the taps, you lower the tanks water level... So in order to top of up the water tank you need to fill up with more water from the storage drive... An SSD will add water faster than a mechanical HDD.
In short for every second of screen time, the Playstation 4 is able to render up-to 5.5GB of data, because that is how large it's Ram pool is... But over 30 seconds the mechanical hard drive can extend that by an additional 3Gb of data by streaming in assets.
Hope that has cleared it up.
Everyone clinging to certain advertising buzzwords is how the confusion has set in... But it's nice to know every generation we have a group of people who become CPU/Ram/SSD experts over-night, so that's great.
I liked this way of explaining it.
Water tanks and water taps :)
"In short for every second of screen time, the Playstation 4 is able to render up-to 5.5GB of data, because that is how large it's Ram pool is... But over 30 seconds the mechanical hard drive can extend that by an additional *1,5-3Gb of data by streaming in assets."
So around 8,5 GB over 30 sec (if drive is not anywhere near full or fragmented, and is running near its optimal 100 mb/s).
Last edited by JRPGfan - on 14 June 2020
Playstation 5 could have all that in its memory pool alone.
Or load it in less than 1sec.