The 360s memory controller is built into the GPU. Essentialy the CPU goes straight to this memory controller then to the memory. In no way does the CPU go through the GPU.
RSX has to go through two memory controllers and hop two busses to get to the XDRAM, hence more latnecy than the Xenos - unless the Sony has somehow made controllers without latency. There is also the 128bit bus to the Cell, which puts limits on how much data can be moved between the two.
The EDRAM makes up for most of the bandwidth the CPU would steal (as I've said above)
The pooled design is far more flexible, allowing a dev to devide the RAM in any way they see fit. But overall the systems are close to even with regards to memory bandwidth. Really, its just simple and easier on developers.
Keep in mind that the current PS3 design was rushed, whereas the 360 has had this design worked on for years.
Leo-j said: If a dvd for a pc game holds what? Crysis at 3000p or something, why in the world cant a blu-ray disc do the same?
ssj12 said: Player specific decoders are nothing more than specialized GPUs. Gran Turismo is the trust driving simulator of them all.
"Why do they call it the xbox 360? Because when you see it, you'll turn 360 degrees and walk away"







