AMD Zambezi news, info, fans !

[drfedja]

Can you tell me that a non 8 core processor how can do 6.72x speedup in a multithreaded task?

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BD modules scales very well, but there is problem with very very low per module IPC. It is ~30% lower than K10.5.

The slide is from December 2010. Bulldozer taped out in Q2 2010. The data is most likely NOT based on simulations but on real hardware. The clocks on the initial steppings could be low but they can extrapolate performance of higher clocked models easily. The point is that by Dec 2010,the design was well pass the finish point and they were doing the sampling to partners. The only problem they may hit by that time is low clock,low yield or leaky parts with power draw issues(or any combination of those). If anything was wrong(design bug)they would have known it and figured it in all the performance expectations and hence that scorpius slide would have it too. That is why I think there is no performance problem but something else is going on.

Maybe data from slides was came from earlier time than Q2 2010. Maybe R&D team was thinking that some mysterious bug can be solved before launch. Maybe they don't know what's wrong with BD....