% improvement from LGA775 X9650 to i5-6600?

[lJoublanc]

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 GTX1060, so that is up-to-date.

 

[lJoublanc]

So in the end I got a Z270 board with a 6600K.

In the entry level boards, the z170 boards cost the same as the z270 pretty much. Leaves me a little upgrade space in a couple of years; hopefully the 1151 socket will last for a year or two still.

The 6600K I got second-hand for 190, which was a nice little saving. I read somewhere (I think ars technica) that the skylake/kabylake 6600K/7600K performance difference on the i5's is pretty much non-existent when you clock the memory to 2400 Mhz, which I have done.

The difference was rather surprising; in some games it's really clear, up to 2x frame-rate, but in others not so much (e.g. deus ex: MD), which is quite weird! Anyway, it was high time for the upgrade ...