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[drfedja]

If Sandra uses AVX in the MM Benchmark, that's not strange. Thuban doesn't have AVX and all benchmarks using it are 10 times slower.

Why do you think that AVX is so much powerful than SSE? Thuban Core and BD module can execute same number of raw FLOPS. AVX and SSE are vectorised packed FP instructions. BD module can execute one 256-bit AVX which contain 4DP FP operations, same as two 128-bit AVX or SSE. In some cases 256 AVX can be faster, but how much? Two times...

So going from 3.1Ghz to 3.6Ghz do these 2 CB scores seem to be inline with reality?

CB scales perfectly with frequency. 3.6/3.1*5.24 = 6.08. Something is wrong here with this results or frequency of CPU's isn't accurate. Actually I think that is much lower than CPUz's readings.

[Opteron146]

Why do you think that AVX is so much powerful than SSE? Thuban Core and BD module can execute same number of raw FLOPS. AVX and SSE are vectorised packed FP instructions. BD module can execute one 256-bit AVX which contain 4DP FP operations, same as two 128-bit AVX or SSE. In some cases 256 AVX can be faster, but how much? Two times...

Yes, AVX would do nothing, but FMA could be the big difference. SiSoft normally always programs special code for each CPU, thus on Bd, it should use XOP&FMA.

[drfedja]

Yes, AVX would do nothing, but FMA could be the big difference. SiSoft normally always programs special code for each CPU, thus on Bd, it should use XOP&FMA.

I agree, but we don't know how SiSoft works with FMA and XOP turned on and off. We will know when we get BD on the bench table.

As you can see,same peak flops in all 3 cases. I rest my case .

Yes, but what is the module count ? For 64 DP FLOPS you must have 8 SB cores and 16 FlexFP's. That slide is BS, because there is no CPU with 32 BD cores, or 16 BD modules. Interlagos has 8 BD modules or 8 FlexFP's which can execute up to 32 DP FLOPS, or 64 SP FLOPS.
If you compare 8 core Xeon and 16 core Interlagos that slide make sense.

@ rajada
yes.

13% increase in performance over 12.5% increase in base clock speed. Factor complex turbo in and it seems logical to me.

No, there is 16% increase in clock speed and 13% increase in performance. Gap is too big between increase of frequency and performance or scaling is too bad.