AMD has officially released its Shanghai processor today, most tech sites won't review this processor as it's a server part but some database testing can be found over at AnandTech. Here's a snip from their conclusion:
As you've seen, AMD is still competitive with Intel's 3.0 GHz Harpertown in the database workloads that we've shown here. We were quite surprised that Shanghai was able to meet and, in some cases, pass Harpertown at various workload levels in some of the benchmarks. Obviously, when it comes to power, AMD is still leading this space by a significant margin. FB-DIMMs obliterate any power efficiency in Intel's processors, especially when you have eight (or more in some cases) of them present in a server.
What about how Shanghai fairs against its older brother Barcelona? Well, in some cases, the gain is clearly just the increased clock speed. However, in others Shanghai achieves an increase of anywhere from 10-15% over and above the clock speed difference.