"2.33GHz Intel Wolfdale tested"

[poullos]

Looking at the game tests it seems to be about 10 percent faster on average, although for some reason it's more than 31 percent faster in Half-Life 2, up some 22 fps compared to the E6550.

Source engine is the best benchmark of game engines for cpus. Remember early benchmarks of QX6800 when only the source engine was showing an increase due to higher cpu power.