Factor in the overclocking option of course and it puts these plus/minus claims all over the place.
Hence why I went for a 2700K/5.0 setup, should do me for a while. I have a 3930K/4.7 rig for
video stuff.
Btw, g-unit1111, in many cases the differences between those various generations was as little as 5%,
not 10%; the latter is definitely on the high side of what is possible (best case scenario). For threaded
loads like rendering, a 4770K is 15% better than a 2700K (both at stock).
As test results show, a 4770K at (say) 4.5 is faster than a 2700K at 5.0, but it's hard to
get a 4770K running reliably at 4.5 (most will be lucky if they can get above 4.3), whereas
it's stupidly easy to get a 2700K at 5.0, and the latter can be done with a low-cost, quiet
cooling solution too. An old TRUE with two NDS PWMs works nicely. The cost difference is
significant.
The big plus of newer 4K chips is less power consumption, newer chipsets, more features,
more Intel SATA3, PCIe 3.0, etc.
The o.p. says he doesn't edit/render video material, so he's right that an i5 should be more
than enough for a fair while, IF he chooses a model like the 4690K that allows for a good oc.
A high i5 oc in the long term can make up for the lack of HT, for those situations where HT
can help and thus a lower clocked i7 is normally quicker. In that sense, an i5 K-type offers
its own future proofing via oc potential. Excellent example of that years ago was the i5 760
which could happily run at 4.5, knocking the wind out of AMD for a fair while. Reduce the
cores and it gets even more extreme, eg. an i3 550 is fine at 4.7+, while I suspect my i5 670
will best 5+ when I get round to testing it.
Ian.