lJoublanc

Thanks @zMeul for the actual benchmark numbers - really helpful. The overclock I have on my chip gives roughly 15% more FPS in games, so still, from what your numbers show, and from what various other posters are saying here, it does look like a 100% improvement.! Funny that, when the first gen of core-i chips came out, this quad core was still competitive, falling somewhere in the high-i5/low-i7 performance range. Guess this confirms it's time for an upgrade now!

I have an ageing LGA775 motherboard with an X9650 @ 3.5 GHz, with DDR2 memory running at 1000 MHz. It's showing it's age and I'm of a mind to upgrade to a skylake processor. I use my PC for gaming mostly; I do use it quite heavily for software development and compiling, but I'm pretty admant on going for a consumer line of i5/i7 chips with LGA1151 chipset, rather than one of the Xeon solutions. So I would think maybe an i5-6600 or i7-6700K seems to be the consensus. My question is, given those options, what sort of gaming performance improvement can I expect, percent-wise, for games released in the past year, say? If somebody can point me to benchmarks, or provide some numbers to back-up their reasoning, that would be great; LGA775 doesn't get benchmarked much nowadays! Also worth mentioning I have a GTX1060 so I'm covered on the graphics side; this is just CPU/chipset upgrade.