4790K is much cheaper if you get a $150 and below mobo. However, plenty of motherboards are $180-220. Even a $250 X99 board will be stacked with features, possibly Ultra M.2, and even USB 3.1. So $70 premium, maybe another $50 for RAM. CPU is $100 more. Add it all up, $220 more but now amortize the cost over 3-5 years:
$220 / 3 = $73.3
$220 / 4 = $55
$220 / 5 = $44
For someone building a new system from scratch, it will be a $1,300-1,500 PC vs. $1520-$1720 PC, not much difference.
I mean people pay $150 more for 780 over 290 or $80-130 more for 770 2/4GB over 280X for no real increase in performance or $500+ over 290s for a 780Tis for a 10-15% increase!! If I was building from scratch, I would actually justify getting cutting edge DDR4 that I can reuse in 3-4 years when DDR3 is worthless. Secondly, even if only 1-2 AAA games show a 20-30% increase in gaming, all of a sudden $220 spent will give someone with $1,400 of 880s/980s/390Xs maximum performance. This platform isn't meant for someone who spends $500 on a CPU, $250 on a mobo and $150 on a GPU. If you want SLI + M.2 PCI 4x, X99 is better than Z97. But for someone who has $1000 of GPUs, what's another $220 for a 6 core Hw-E that will last for a loooong time. The case for 4790K is stronger if someone upgrades every 3 not 5 years.
I think 4790K is way overhyped. It has difficulty reaching 4.7-4.8Ghz. If 4790K could hit 5Ghz 90% of the time I could understand. I just can't see how a 4.7Ghz 4790K will prove to be a better choice than a 4.5Ghz 5820 over 4-5 years.
5820 costs $100 more for 2 more cores but 4790K costs $100 more over 4690K for HT. Looking back, I didn't even have to upgrade my i7 860 @ 3.9Ghz to 2500k, which would mean my 860 would have lasted me 5 years!!! The time where we upgraded a CPU every 1-2 years for a real increase in performance is long gone. 6-core HW-E @ 4.5Ghz should last 4-5 years for games with no need to upgrade.
If one makes a case why spend $ to future proof, then might as well get 4690K, OC it to 4.7Ghz, save $100, sell it when Skylake comes out and get that. I know I am in the minority but I can't justify 4790K when it doesn't have the future proof confidence about it and yet OC 4690K is just as fast in 95% of games.
My disappointment is that neither the 4790 nor the 5820 OC aren't much faster than 2500K OC in games. I mean how many people replay Crysis 3 over and over??? Every time I think about upgrading the CPU, it ends up better getting a faster/larger SSD and new GPUs. Ahhh... Frustrating.