Perhaps the most value-for-money purchase that can be made for someone seeking ultimate performance! There is a significant difference in performance, which is worth the extra money compared to the Crucial Ballistix 3600MHz (40 Euros cheaper), this well-known and beloved kit, as well as the overclockability of the same or higher level compared to the much more expensive G.Skill Trident Z 3800MHz CL14!

The memory modules have successfully run on XMP on AMD CPUs and with custom timings in the following configurations:
3733MHz 14-14-14-30 @ 1.45V on Intel i5 11500
3800MHz 14-15-15-32 @ 1.48V on AMD R7 3700X
4000MHz 15-16-16-34 @ 1.48V on AMD R7 5800X
4533MHz 17-18-18-36 @ 1.48V on AMD R5 4650G

Detailed review with measurements and comparison to Ballistix: https://youtu.be/fKn8FybF2_4

The memories are incredible and extremely fast at these speeds, the Ryzen are performing so well.

After a lot of research, I chose and sacrificed the RGB of the Patriot because they are slightly better, as soon as I plugged them into the Gigabyte Aorus X570 Pro motherboard with a 3600 overclocked to 4.2Mhz, they immediately synchronized themselves at 4400mhz.

I haven't overclocked them yet to see how far they can go without increasing the voltage

I have them on a [email protected] with an MSI z490 unify motherboard, 4 dimms totaling 32gb of RAM. With 2 dimms, they play directly at 4400mhz with XMP and even with lower voltages than the default set by XMP, vccio 1.25v and vccsa 1.3v! It is possible that they can play even higher, but I haven't tested it. Unfortunately, with 4 dimms, 4400mhz was not achievable and the maximum I could go was 4300mhz. However, with a little tweaking and endless hours of stress testing, I can play with all 4 dimms at 4200mhz with timings 17-17-17-34-2T!! Truly unbelievable... These memories are amazing and I highly recommend them, and finally, NO RGB and frills and scents!

With Asus rog strix X570-e gaming motherboard and Ryzen 3700x, after multiple upgrades to 4400MHz and 4200MHz, it gives me a blue screen. From what I have researched, these frequencies only run with Intel. There is no problem with frequencies below 4000MHz. If I find a solution, I will come back and update.

Edit: Having these memories for 2 years now and keeping the RAM after upgrading the CPU, I can say that I see their true value! Note that on the 3800x, the memory was running at 3800Mhz 16-14-14 for a logical voltage <1.5V.
On the Ryzen 5700G, the memories not only run smoothly at 4400Mhz 1:1:1, but also allow for extra overclocking/timings, which I will discuss later.
Ultimately, these memories are a gem. I would choose them again without hesitation until I see improvements ONLY from the upcoming DDR5.

TIP: If for some reason MCLK:FCLK:UCLK 1:1:1 are not synchronized, try manually setting them instead of using AUTO. Also, rounded numbers (e.g. 2200MHz) are preferable.

17/04/2020 old review
I have been their owner for 5 months at the lucky price of 120€, but I have been using them for only 1 month and I have the following to say:

B-die, for Ryzen 3800x and Asus x570-f. The negative aspect so far is that none of the D.O.C.P. profiles posted with "Auto" settings, only at 2133, unless I manually increased them, which I did for 4/5.
I haven't dealt with high frequencies yet, so I will come back to that in the future since I am currently running them at 3766MHz@16.
I have to say that as RAM, they are incredible, as they can stably run at 14-14-14 for many at the same frequency (with a capable Mobo), something that takes time to find the correct settings for the rest (I managed it, but not satisfactorily "yet" - yes, with Ryzen calculator. I wasn't one of the lucky ones for everything to work perfectly with just one click).
With tightened timings at 3766MHz (IF1866 1:1), I achieved <64ns latency stable.

My opinion "so far" is that it's worth getting them for Ryzen, as the Viper Extreme from 4200mhz+ are guaranteed b-die, as long as they are close to the lucky price. Otherwise, for your convenience, get something closer to 3700mhz-not above it to ensure it works with DOCP/XMP, and in the future, tighten the timings.

Extra tip: B-die loves the extra voltage. So don't be afraid of 1.45V, even 1.5V!
Extra tip 2: These specific ones are equipped with extra capacitors around the die chips to withstand everyday use, even in conditions that are considered extreme for conventional RAM! ;-)