TBH if it were me I would wait for Pinnacle Ridge, If you clock an i7 6850K at over 4GHz you get more single-threaded clock speed than an overclocked Ryzen.
Barely. And when I say barely I mean, barely. Let me explain this as there seems to be some confusion. I came from a 5820k. That was my last CPU before I got this 14 core thing. I can tell you now that no matter how hard I pushed it it would not catch a Ryzen 1600 @ 4ghz. IPC be damned, clock speed be damned (and I had a good 5820k that would do 4.6ghz for bench runs).
Here is a stock 6850k.
1154 in Cinebench. I can tell you now that even at its hardest clocks (the 6850k) and if you absolutely won the silicon lottery you would have trouble. I just looked at the result for a 4.7ghz 6850k and it was around 1370 points. However, do note that most 6850k clocked like crap and you would be lucky to get 4.3ghz out of them before they crapped out. All balls to the wall my 5820k used to do about 1250 points.
Now let's look at the 1600 overclocked to 3.9ghz
1303 points. At 3.9ghz. Now as we know, the SMT on Ryzen is faster than HT on Intel. All of these factors (plus faster RAM) make Ryzen faster than Broadwell E clock per clock. Push that up to 4ghz (usually most will do this) and it's pretty much dead level dead even, even though the Ryzen is running 700mhz slower.
Couple of other things to take into account.
1. Chrazey is running an Asrock X99 ITX, so he has no chance of ever getting near 4.7ghz (even if he won the lottery) and
2. Broadwell E is much slower per clock than Ryzen, again thanks to the memory and yada yada ya.
So I maintain, the 1700 is not a side grade at all and you guys have called it wrong. The 1700 will manage (ironically) about 1700 points in CB. Simply because of the extra cores.
Stock 1800x scores over 1600 points.
I'm not going to bash on and on about whether he would use it, whether to him it's worth it or anything else. It is an upgrade, and it would be better in all heavily threaded apps. Not a ground shaking earth moving upgrade, but an upgrade all the same.
Oh yeah as for Pinnacle Ridge? sure. It's well worth waiting for the extra clock speed it should bring. Been talking to a few guys about this and we've all agreed that this 4ghz brick wall on Ryzen could well be either bad manufacturing or, it was artificially imposed. I have never, since the launch, seen a Ryzen that will run faster than 4ghz. Maybe under LN2 but yes, all very strange.
However it would make sense, because if Ryzen could clock to 4.5ghz or more AMD would never sell another chip. There would be absolutely no point in buying one.