ps4 shared memory advantage over pc

[Reddick]

PS4 uses shared memory APU unified memory... PC have seperate memory blocks for GPU and CPU

so does that mean that a console optimized game could not work on a PC


go here on neogaf and look at what user "Randsec" says about this http://www.neogaf.com/forum/showthread.php?t=726691&page=7

 

[Reddick]

The new consoles are backward compatible with PC-class programs. Existing PC games and programs should port fairly easily to console, if one counts a new OS interface and perhaps a need to optimize for multiple cores as "easy."

And programs written for a console in the PC style should port similarly easily to a PC. BUT...

The consoles have a fundamentally different architecture: They use APU-style common memory. In contrast, a PC with a separate video card has separate main memory and video memory, and simply does not have common memory. No such PC can be bought or built.

While the APU approach has pluses and minuses, the minus for compatibility is that best APU efficiency involves data in common memory being worked on "simultaneously" by CPU cores and GPU cores. That option simply is not available on a PC with a separate video card. The only PC architecture similar to a console is an APU without a separate video card. And available APU's are not as strong as those in the consoles.

As console programs change design for maximum console efficiency (to appeal to the most-profitable market), they may become difficult to port to a normal PC. Possibly we could see releases with both a new "console" engine, and the old "PC engine." But only the console engine will continue to develop, and that will only work with common memory.


http://www.neogaf.com/forum/showthread.php?t=726691&page=5 this is what randsec said on page 5 post 220

 

[renz496]

Why it will not work? That's why they port the game so it will work on the pc. Will it be hard or not is another story but there is no such thing that a game cannot be ported to pc since it was optimised for console architecture. Just look previous gen console. They were not even x86 based like current console and yet we still see game from the both console being ported to pc.