1 Solution
Hello,
The second thing you need to know, aside the single/dual ranked stuff, is that each kit can mount different ram chip, from different manufacturers.
Usually the ram chip are produced by samsung, micron, hynix, so each chip behave differently depending where it come from.
Top end kits usually mount samsung B-die ram chips, dunno if it changed nowadays, these rule out 3200Mhz CAS14 usually.
Not sure the kit you choose get these chips since it run 3200Mhz CAS16, that's a bit high to be B-die for sure.
If you want to be sure to get the less hassle possible, unfortunately you need to pay the price and get some high end kits.
Not matter if you will run only 2933/3200Mhz, its good to get at least a kit that can mange 3400/3600Mhz, that usually mount samsung B-die or high end chips.
I was looking for the kits you choose and did not found any useful information about, so i can't say for sure it will run smooth at 2933Mhz.
Dunno if these kit are the same as the F4-3200C14D-32GTZR B-die but with higher timing to match precisely ryzen platform.
I would rather get something like this personally:
-F4-3200C14D-32GTZR
-F4-3600C17D-32GTZR
-F4-3200C14D-32GTZ
-F4-3400C16D-32GTZ
-F4-3200C14D-32GTZKY (Neo version different colours be sure CAS14)
-F4-3600C17D-32GTZKW
-F4-3400C16D-32GVK
-CMR32GX4M2F3600C18
Last thing, setting up properly ram timings and speeds is not overclocking, it is simply setting up your ram.
We speak about ram overclocking when one push the DDR4 ram platform over 4000Mhz.
Nobody that is running ram lower than 3600Mhz is really overclocking the DDR4, despite all the echo you heard about. 
There is nothing hard about, if the system do not boot straight at 3200Mhz, or even 2933Mhz just check the bios ram settings.
One often need to adjust a couple of setting to run smooth with these kind of high end kits.
Bottom line, the only 16GB ram modules i could find being single ranked for sure, come from the main manufacturers.
Again i couldn't find any other informations about the usage of these chips aside from server ram stuff, no real product from Gskill from example.
Hello,
It is true that memory is unfortunately expensive, especially if one want good kits and if you want huge amount of ram like 32GB; 16GB are more affordable.
With the kit i gave you, i can say almost for sure you will get 2933mhz with a decent CAS and even 3200Mhz if one spend a bit checking the settings.
But you are right these kit are overpriced, costing more than the cpu and the motherboard together, it's a shame but unfortunately it's how the market goes. 
Then as said before lower end kits would work fine but maybe not at 3200Mhz or maybe not straight like with the high end kits.
In any case with any 32GB kit you will reach 2666mhz that is the minimum to get good performances for sure, 2933Mhz most probably, 3200Mhz with hassle in my opinion.
So bottom line, always aim at least to a 2933/3200Mhz kit, even if it is a budget one, because ram speed is very important for Ryzen platform.
One should always try to get the fastest memory he could get, even if these are not top end kit, so absolutely do not buy basic ram working at 2400Mhz, get a kit that at least can support 2933Mhz.
The one you choose initially is still good memory kit, did these they cost too much for you?
You can link me the kit you find fitting your budget, i will check the review and how they behave for you.
Wimpzilla sorry for the delay! I didn't have time to answer due to my work..
I went with the G.Skill Flare X 32GB DDR4-2400MHz (F4-2400C15D-32GFX) kit. I ordered it yesterday at EUR 278 (about 320 USD). I bought that kit mostly due to its cost because any other option exceeded my budget a lot...
Also, one last reason which made me to end up to this kit is that (as I also said in my previous post) in benchmarking videos I saw the performance difference is very low: only 5-7% faster performance with the 2933MHz RAM than the 2400MHz in average!! So I think I will be OK with the 2400MHz...
A big thank you for your help and time you spent for me to give me options and to clarify things with the ZEN platform!!
Hello,
You are welcome.
Try anyway to bump the memory speed to check if it support faster frequency, you never know.
Let me know if you need help if you decide to tune a bit the bios settings.
Maybe you can try to get 2666/2993Mhz out of it with if you spend some time tuning the ram.
Good luck, i understand your choice, 278e is already cheap with the actual ram market, for a 32GB kit. 
Ok! I will test it in about 15 days which I'll have my whole system in my hands and start to building it!
If I'll have further questions with the settings, I'll write you back here...
Too my point, you can have errors generated by too high a RAM speed that will never cause a crash or a failure to post. The data written to RAM will be slightly altered, and over time, those small errors can corrupt data files or the entire OS.
For example, here is my data from 3200 MHz, CL14 and 4 SR DIMMs installed. After 300% coverage over my RAM not a single error has posted, a sure sign that everything is okay. If I raise the speed to 3333Mhz, everything boots up just fine, but I will start to see errors crop up in memtest.