PS3 XDR bandwidth?

I understood Shiftys critique & thanked him because it was far more constructive than simply fobbing off white papers as PR!

 

GPU's are much better in dealing with latency than CPUs...i.e... They are much more efficient in hiding latency.

 

AFAIK, XDR1 will only scale up to 6.4 GHz effective (which is double the rate of PS3's XDR). XDR2 doesn't really have an officially stated upper limit from what I can see, but it will apparently start at 8.0 GHz effective.

102.4 GB/sec on XDR is possible with 6.4 GHz * 128bit bus controller. XDR2 at 8.0 GHz would get you 128 GB/sec. Whether or not XDR2 scales up to 12.8 GHz effective transfer rate is yet to be seen -- it's only stated that it will scale up beyond 8.0 GHz with further process improvements. And the more difficult part of scaling up to that kind of transfer rate is to be able to wiggle voltages on the motherboard wiretraces. XDR uses a low-voltage swing (0.2 V) to handle this, but I'm slightly doubtful that such a thing will scale up to a 6.4 GHz clock signal (12.8 transfer rate).