I believe that url might not offer the best insight when talking about a potential refresh from the Westmere series Xeon to the SandyBridge E series Xeon. Rather than looking at the i7 980x you should look at the x5680. For SandyBridge rather than looking at the 3930k you should look at the E5 1650. It paints a slightly different picture.
This is another synthetic benchmark to consider but it shows aprox. 37% increase. http://cpubenchmark.net/cpu_lookup.php?cpu=Intel+Xeon+X5680+%40+3.33GHz
Who knows what will actually be released... if anything. Just a thought.![]()
The two I linked are consumer versions (i.e same performance) of the two Xeons he asked about and show real world usage which is a much better example than PassMark. As you will see from your link the i7 980, i7 980x, W3680 and X5680 all have the same performance as do the and 3930K, E-5 1650 because they share specifications. It doesn't much matter which you compare.