Quote Originally Posted by nex_73 View Post
Ok, i stick my chin out with this prediction, feel free to smash it once real numbers are out.
Zambezi FX (BD) thread VS Phenom II (Thuban) thread performance: (not including support for new instruction sets)
Heres what i got:
the IPC scaling varies alot based on if threads are using a module by them selves (1.25x IPC compared to thuban) or if they are the second thread on the module for a .95x IPC. which averages out to 10% better IPC (which can be seen at 4 and 8 threads). and btw these are after we compare differences in clock rates and may be a little on the high end.

when it comes to 1-2 threads BD will be very fast since it can run each thread on different modules, and still use full turbo
3 threads seems pretty low since its not sharing resources, and 4 threads is fast again because thuban loses its turbo
5-6 have increased IPC vs 4 threads because now that it cannot use the faster turbo its spreading threads across all modules first
between 5-8 threads i had it use less and less turbo since its tough to tell how often it will really use it.

i think the most interesting part is how smooth the curve is, because of different turbos, and different utilization, its almost a perfect arc

*this was all done out of boredom while my steam game finished downloading
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