| Bofferbrauer2 said: 2. 28 GB is in Computer terms a very odd number and would need a very wierd connection (like 224bit compared to the more even 192bit or 256bit). Additionally this would be very expensive even if the RAM prices would normalize again. Finally, it's just too much for a console, 16Gbyte it will most probably be, possibly 24 if we're really lucky, but not 28. |
The Playstation 4 actually has 256MB of DDR3 in conjunction with the 8GB of GDDR5, the Pro took the DDR3 memory pool to 1GB.
Which is what I think he was alluding to... 24GB of main memory (384bit bus like Scorpio...) And 4GB for background tasks/OS and the like.
So they would both have their own buses.
| fatslob-:O said: Higher resolution textures do have an advantage but there would be less need for them if we had a good LOD system or texture stitching system in place ... |
Even games like Mario Kart DS, which had a screen resolution of 256×192 used textures for landscapes and such that were 1024x1024 pixels.
| fatslob-:O said: Higher resolution textures do have an advantage but there would be less need for them if we had a good LOD system or texture stitching system in place ... DCC only helps wih framebuffer compression. You can compress normal maps with texture compression. Lightmaps are a bad idea going into the future of global illumination and shadow map compression is not a realistic idea ...
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Delta Colour Compression does reduce bandwidth demands though, which means there is more room for say... Texturing.
Correct you can compress normal maps with texture compression, depending on compression algorithm of course, not all texture compression schemes do compress normal maps.
Lightmaps are probably going to stay for the immediate future.
Shadow map compression is already happening in 3dc+
| fatslob-:O said: Both are currently bad ideas ... With megatextures you you have to manually do texture filtering in the pixel shader and that can get expensive if you include aniotropic filtering and with PRTs you're stalling a lot ... |
Well. There are caveats like with any technology.
AMD does have hardware support for Partially Resident Textures and the concept is sound.
Even the latest doom game used Partially Resident Textures... And that game not only looked fantastic... But it ran silky smooth even on average hardware.
| hinch said: If Sony and Microsoft go Nvidia (Volta GPU or better) that would wreck the base PS4 and Xbox One by some margin. |
nVidia is unlikely ever to happen again.
| Intrinsic said: Memory is very important. Particularly HBM. 16GB of HBM with a with bandwiths as high as 512GB/s would be a very big deal in a console. And I also believe that the next gen consoles will come with two seperate memory pools. 16GB of HBM for the games and 4GB of LPDDR4 for the OS (yes the same kinda ram used in smartphones today). |
Do you undestand how many stacks of HBM would be required to achieve 16GB? And how much bandwidth it would actually offer? ;)
GDDR6 though is likely going to be the memory technology of choice for next-gen consoles... People always get crazy ideas of what technology is going to end up in the next gen (Like people claiming NX was going to be faster than the PS4 Pro or Scorpio was going to have Ryzen) and are often incorrect. Why? Cost. Or their lack of knowledge about costs.
GDDR6 is cheaper than HBM and will likely be the memory of choice.
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