Maybe you should consider yourself to watch this Intel Skylake Core i7 6700K vs 4790K/3770K/2600K Gaming Benchmarks comparison. Well, I know that video is not directly compared i7 SkyLake to your i7 920, but seeing it faster than i7 3770k which I know is many times faster clock for clock than your 1st gen i7, you can notice the difference.
And click this for Synth. benchmark from anandtech.
Well, don`t get me wrong, but I just want to make you know about how every generations of i7 improved it`s performance.