Zambezi core in FX4100 has exactly 25% lower SIMD/fp performance than Deneb core... Fits kinda well with that 80% claim from the slides. But AMD said they expanded the unit and some other improvements so that SIMD workloads at least won't be slower than family 10h. We see that they missed the mark by 25% since it takes Phenom @ 3.3-3.4Ghz to match FX4100 @ 4.2GHz. Pretty disappointing IMO. Even in single thread department Zambezi's "mighty 256bit" FPU fails to beat Deneb core from 2008. Wtf is going on AMD?

Again I must wonder how in the world is Interlagos going to outperform MC @ 2.5Ghz in legacy (non recompiled) HPC workloads by more than 35% ?? According to all the leaks it should barely tie it or with help of Turbo beat it by 10-15% tops (if that much). Pretty puzzling. Not to mention AMD state that peak Flops are the same for legacy and AVX (recompiled) binaries,so no magic there either.