Intel Core i7-4770K Review
PC Mark has always included a lot of media transcoding tests to give a good indication of performance in the type of tasks that are commonly used.
In both PC Mark 7 and PC Mark Vantage the performance increase between the 3rd and 4th Generation Intel CPUs is nothing short of staggering. So often we see companies proclaiming a benefit from their new instruction set that just doesn't materialise in real-world testing, that an improvement actually occurring is enough to make us sit up and take note. It's not just a clock speed thing either, as the computation scores are very close.
PC Mark Vantage
PC Mark 7