PLEASE NOTE: The QX6700 results here are not comparable as they used an earlier version of Sandra; they are shown merely for interest.
The Sandra tests clearly show that the QX9650 Penryn architecture is significantly faster for floating point; surprisingly it is a hair slower for integer arithmetic, however the difference is so small that it is likely due to experimental error.
The memory banwidth of Penryn is significantly faster than previous quad cores as we can clearly see in the chart below.