Actually Cinebench is using scalar SSE instead of vector SSE instructions thus you see no change in K8 vs K10 scores.The use of vector SSE is the main point of even optimizing for that instr. extension set.Thus Cinebench is not a "good" benchmark.
Also i know that people somehow think that SPI represents a valid test to show a strong fp perfromance (intel clearly owns this test),but there are programs that calculate Pi better on AMD hardware but i don't see anyone using these(http://www.xtremesystems.org/forums/...&highlight=gmp).
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