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I recall people generally being unimpressed with the 4770k when it launched. It was very hot, wouldn't overclock very well compared to the 3770k, and in general wasn't much of an improvement. OCUK sold them with a corsair h100i cooler so you could have a chance of getting a decent overclock, which is how I got mine. Having said that, it is still quite happy playing games at 60fps with a 390x at generally high settings and I certainly can't justify an upgrade! It just didn't have the wow factor when I changed from an AMD x2 5200+ to an i7 860.
Is there any time scale on when a CPU will be out which will be a biggg performance gain for gamers and be a worthy upgrade? Seems atm you can throw a few grand on a new build and get exactly the same gaming performance as a top system (Other than GPU) from 2012?