http://www.techspot.com/review/679-intel-haswell-core-i7-4770k/
Regular TechSpot readers will have no doubt spotted several mentions of Haswell on our front page this year. In the past few months we have covered everything from model names to performance and battery life claims. A key focus has been Haswell's graphics, with rumors suggesting its performance is set to be 2 to 3 times that of current HD 4000 integrated graphics.So what is Haswell exactly? It is Intel’s 4th generation Core architecture which will see a major refresh of the entire Core i3, Core i5 and Core i7 product lineup in 2013. Whereas last year’s Ivy Bridge was a "tick" release, Haswell is a tock and traditionally that's meant a more significant advance forward.
Final ThoughtsIn terms of performance the upgrade to Haswell is very reminiscent of what we observed when going from Sandy Bridge to Ivy Bridge: for the most part we saw very minor performance increases. Haswell looked most impressive in our encoding benchmarks where it was 3 to 13% faster. In our battery of application-based it was was 2 - 11% faster than Ivy, while the synthetic benchmark programs showed only minimal margins.