Zenji Nishikawa has uploaded the latest issue of his article series about 3D game technologies. The subject of this article is the concern about sub-HD rendering in the next-gen consoles. It also contains anonymous developers' quotes, all of which has been translated by One.
* The RAM bandwidth of Xbox 360 GPU is almost equal to RADEON X1600 XT and shared with CPU by UMA.
* Without the eDRAM pixel processor doing 4xMSAA, the fillrate of the GPU core itself is 4 billion texel/sec and almost equal to GeForce 7600 GT.
* While the Xbox 360 has a 3.5 times broader bandwidth than the original Xbox, 720p pixels require a 3 times broader memory bandwidth. It leaves only 0.5 times headroom which is insufficient for multiple texture lookups by complex shaders.