All new (except old case):
2700 (non x)
AsRock x470 Taichi
2x 8GB DDR4 3200 CAS 16 - 1T
480GB HP EX920
4GB RX570
Seasonic 520w bronze
Antec 300 w/ 5x Arctic P12 PWM fans.
Hyper 212 Evo (terrible fan, immediately replaced with P12)
Replacing an old/failing system:
2500k (set max 4GHz boost, 3.8GHz all core)
MSI P67A-GD65
2x 8GB DDR3 1600 CAS 9 - 1T (replaced failed 2x 4GB)
240GB Crucial M500 (on SATA2, broken SATA3 hence budget SSD) + 1TB 7200RPM HDD
2GB 6950
Corsair HX 520W (old HX series
https://www.anandtech.com/show/2724/10 )
Antec 300 w/ stock fans + 3x Yate Loon D12SL
Arctic Freezer 7 Pro
It's extremely disappointing, I built a vastly faster system for a friend 4+ years ago (end 2014 - 4790k based) and that's what I was expecting (or better). After hours scouring the net, the only thing I can find is that the new Ryzen chips are only just on par with the old Sandy Bridge chips clock for clock (so their only advantage is multi-threaded). However the 2500k had a working boost that could also OC, so it's much faster under load (and can still enter proper idle/low power). The 2700 has no working boost, I can't find any setting for the claimed XFR/Precision boost (not under NBIO options) so the chip is stuck at 3.2GHz max. This x470 MOBO was supposed to be the best for the 8+ core CPUs, having a greater than real 3 phase VRM (MSI being the only other under $200) plus a "good" BIOS (vs the MSI boards) and having all the latest features (minus 10GB NIC [didn't want/need]). Yes, I did update BIOS and manually tune whatever I could (basically only RAM). I chose the 2700 plus aftermarket cooler vs the 2700x+stock because (despite the good stock cooler) all I see are reports of high power/heat...and my situation heat is a big issue (the 2500k w/ mild OC could hit 90c). Yet this 2700 always seems to operate at "idle", under the heaviest load it stays below 50c with fans at minimum (<800 RPM) even with 1.425v (offset voltage doesn't seem to work).
I feel like I would have been way better off with a cheaper 9400F system...the extra threads don't mean anything if the system is already slow out of the gate. The old 2500k could handle tons of web pages and dozens of programs simultaneously before getting bogged down, this new system is slow all the time and it would be a chore to load up enough stuff to use the extra threads. It's really weird, I was extremely excited about AMD "coming back" and all the great news/praise on the internet had me excited to try it out. I seriously don't get it...my experience has been terrible, and as far as I can tell I'm doing things right. Sure if the 2700 could boost/hold 4GHz under load it'd be about as fast as the 2500K, but how is that so amazing (even if twice the cores is useful)? At the very least it did get Intel off their a$$ and force them to give us more cores for the money (though they went backwards with the 9th series)...but performance still hasn't gone anywhere. If you tend to run a ton of programs at once (not a single giant multi-thread program) it seems Intel is still the way to go.
Off topic:
I gotta say, the 212 Evo is also disappointing. I know it's been a really long time budget favorite (that I just never needed to try), and now there are better coolers for the money...yet not a single one was in stock at a fair price that I could find. Figured what the heck, it's still better than stock and with a "proper" MOBO + voltage control I should be OK (especially with a bunch of new fans). But oh man, that mounting system is terrible...and the fan is HORRIBLE. Making a warbling rumble and screeching noise even at low speed. The factory finish on the base heatpipe surface was nasty as well (looked like they scraped it on concrete), even 220 grit gave a much better polish.
The Arctic P12 PWM fans seem decent for the price ($6 each). Low power, non offensive at low speeds (800RPM), some airflow as heatsink or case fan, easily chained for fewer PWM ports or easy grouping for a fan profile. Downside: No option/adapter for direct PSU connection (if you need that), seems like cheap brittle plastic (worse than ABS) blades may easily break if contacted while moving.
TLDR:
Spent $1K on new system, got noticeable downgrade, I AM DISSAPOINT!
Oh and I know the Ryzen 3000 (Zen2) are coming out soon, but old system couldn't hold out any longer.