The Important of System Bandwidth

I know how important system bandwidth is, but I want to know what you guys think, because some people don’t see that the PS3 bandwidth of 48.8 GB/s as a big problem, but it is. The Xbox 360 has 5x the system bandwidth, 278.4 GB/s.

PS3 bandwidth vs Xbox 360 bandwidth

What is system bandwidth?
Fist of all, it’s like a pipeline that connects all the parts together. Think of the data as the water flowing through the pipeline.

Xbox 360

The Xbox360’s pipeline is, let’s say ... 5 feet in diameter. This means a lot of water is flowing through the pipeline at any point and time. The Xbox360 has a system to make shore that the pipeline is always full of running data, that means NO BOTTLENECKS.

PS3

The PS3’s pipeline is 1 foot in diameter because its 5x smaller. This means that there is 5x less data going through the pipeline at its best. The PS3’s design is full of bottlenecks.

PS3’s Designed Bottlenecks

1. The Cell's 7 SPE's need to run in order, they can’t run at the same time
2. The pipeline itself, its to small
3. There is no way to manage a continuous flow of data through the pipeline to prevent bottlenecks.
4. The pipeline can’t be shared by the CPU and GPU at the same time, its one or the other. To me this sounds questionable, so if u have any information on this share it.
   

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