idiggory, King of Bards wrote:
Can someone explain to me why shared RAM between the CPU and GPU is superior than having a GPU with its own dedicated memory? Becasue I can't help but feel that it's just adding more RAM than is even necessary just to patch a hole.
So I'm assuming I'm grossly misunderstanding something?
I'm taking a shot in the dark and guessing here.
PS4, unlike PC, can do 2 things Play games or use XMB. That's it really. Shared RAM in this situation lets the XMB use more if a game isnt being played or the game if the XMB isnt being played. They could say well the graphics has 6GB dedicated and the System has 2 GB dedicated. But this creates small problems, you use more GPU power (or have an extra chip to coordinate the video ram and GPU core, which takes up space in whats supposed to be a small console) since its also controlling its own ram instead of the northbridge sorting it out for it, and if no game is running the max ram the system can use is 2 gigs letting 6 gigs go to waste if a video game isnt being played at that time.
Sharing the ram allows Sony to give more Ram to the system while the GPU is being unused and more to the GPU when the system isnt being used, or rather when its in background.
It makes sense kind of, again I'm no expert and not as informed or educated as i would like to be on the subject. Shared memory in a PC is different due to the multi tasking a PC is doing all the time and the variable that comes with the user being able to run w/e.
I know this doesnt do a great job of explaining it all but I didnt want to type out a ton of what I think is going on as fact when I know only the basics behind how the CPU/GPU/RAM/NorthBridge/Southbridge all work together, and even some of that info may be dated becuase I studied it a while ago and don't remember much. Edited, Feb 22nd 2013 9:12pm by BeanX