Digital Foundry: Hands-on with Bayonetta 2

[curl-6]

fatslob-:O said:

curl-6 said:

12.8 GB/s is only for main RAM; eDRAM bandwidth will be vastly higher.

Also, plenty of Wii U games have shown it can handle methods like FXAA and MSAA.

The main RAM matters a lot since since that's where you'll be storing the textures and the materials. 

I realize that there are a few WII U games which have FXAA and MSAA ...

But eDRAM is where you (should) be storing data that requires very fast access. It's big enough that you can use it for a lot more than just stashing the framebuffer, and on Wii U both the CPU and GPU have direct access to eDRAM.

For example, Shin'en have talked about how they used it for: "the actual framebuffers, intermediate framebuffer captures, as a fast scratch memory for some CPU intense work and for other GPU memory writes."